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A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes''. It is similar in shape to the Ancient Greek letter
alpha Alpha (uppercase , lowercase ; grc, ἄλφα, ''álpha'', or ell, άλφα, álfa) is the first letter of the Greek alphabet. In the system of Greek numerals, it has a value of one. Alpha is derived from the Phoenician letter aleph , whic ...
, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version can be written in two forms: the double-storey a and single-storey ɑ. The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English grammar, " a", and its variant " an", are
indefinite articles An article is any member of a class of dedicated words that are used with noun phrases to mark the identifiability of the referents of the noun phrases. The category of articles constitutes a part of speech. In English language, English, both " ...
.


History

The earliest certain ancestor of "A" is
aleph Aleph (or alef or alif, transliterated ʾ) is the first letter of the Semitic abjads, including Phoenician , Hebrew , Aramaic , Syriac , Arabic ʾ and North Arabian 𐪑. It also appears as South Arabian 𐩱 and Ge'ez . These letter ...
(also written 'aleph), the first letter of the Phoenician alphabet, which consisted entirely of consonants (for that reason, it is also called an abjad to distinguish it from a true alphabet). In turn, the ancestor of aleph may have been a pictogram of an ox head in proto-Sinaitic script influenced by Egyptian hieroglyphs, styled as a triangular head with two horns extended. When the ancient Greeks adopted the alphabet, they had no use for a letter to represent the
glottal stop The glottal plosive or stop is a type of consonantal sound used in many spoken languages, produced by obstructing airflow in the vocal tract or, more precisely, the glottis. The symbol in the International Phonetic Alphabet that represents thi ...
—the consonant sound that the letter denoted in Phoenician and other Semitic languages, and that was the first phoneme of the Phoenician pronunciation of the letter—so they used their version of the sign to represent the vowel , and called it by the similar name of
alpha Alpha (uppercase , lowercase ; grc, ἄλφα, ''álpha'', or ell, άλφα, álfa) is the first letter of the Greek alphabet. In the system of Greek numerals, it has a value of one. Alpha is derived from the Phoenician letter aleph , whic ...
. In the earliest Greek inscriptions after the
Greek Dark Ages The term Greek Dark Ages refers to the period of Greek history from the end of the Mycenaean palatial civilization, around 1100 BC, to the beginning of the Archaic age, around 750 BC. Archaeological evidence shows a widespread collaps ...
, dating to the eighth century BC, the letter rests upon its side, but in the Greek alphabet of later times it generally resembles the modern capital letter, although many local varieties can be distinguished by the shortening of one leg, or by the angle at which the cross line is set. The Etruscans brought the Greek alphabet to their civilization in the Italian Peninsula and left the letter unchanged. The Romans later adopted the Etruscan alphabet to write the Latin language, and the resulting letter was preserved in the Latin alphabet that would come to be used to write many languages, including English.


Typographic variants

During Roman times, there were many variant forms of the letter "A". First was the monumental or lapidary style, which was used when inscribing on stone or other "permanent" media. There was also a
cursive Cursive (also known as script, among other names) is any style of penmanship in which characters are written joined in a flowing manner, generally for the purpose of making writing faster, in contrast to block letters. It varies in functionalit ...
style used for everyday or utilitarian writing, which was done on more perishable surfaces. Due to the "perishable" nature of these surfaces, there are not as many examples of this style as there are of the monumental, but there are still many surviving examples of different types of cursive, such as
majuscule Letter case is the distinction between the letters that are in larger uppercase or capitals (or more formally ''majuscule'') and smaller lowercase (or more formally ''minuscule'') in the written representation of certain languages. The writing ...
cursive,
minuscule Letter case is the distinction between the letters that are in larger uppercase or capitals (or more formally ''majuscule'') and smaller lowercase (or more formally ''minuscule'') in the written representation of certain languages. The writing ...
cursive, and semicursive minuscule. Variants also existed that were intermediate between the monumental and cursive styles. The known variants include the early semi-uncial, the uncial, and the later semi-uncial.
At the end of the Roman Empire (5th century AD), several variants of the cursive minuscule developed through Western Europe. Among these were the semicursive minuscule of Italy, the Merovingian script in France, the Visigothic script in Spain, and the
Insular Insular is an adjective used to describe: * An island * Someone who is isolated and parochial Insular may also refer to: Sub-national territories or regions * Insular Chile * Insular region of Colombia * Insular Ecuador, administratively known ...
or Anglo-Irish semi-uncial or Anglo-Saxon majuscule of Great Britain. By the ninth century, the
Caroline script Carolingian minuscule or Caroline minuscule is a script which developed as a calligraphic standard in the medieval European period so that the Latin alphabet of Jerome's Vulgate Bible could be easily recognized by the literate class from one reg ...
, which was very similar to the present-day form, was the principal form used in book-making, before the advent of the printing press. This form was derived through a combining of prior forms. 15th-century Italy saw the formation of the two main variants that are known today. These variants, the ''Italic'' and ''Roman'' forms, were derived from the Caroline Script version. The Italic form, also called ''script a,'' is used in most current
handwriting Handwriting is the writing done with a writing instrument, such as a pen or pencil, in the hand. Handwriting includes both printing and cursive styles and is separate from formal calligraphy or typeface A typeface (or font family) is ...
; it consists of a circle and vertical stroke on the right ("ɑ"). This slowly developed from the fifth-century form resembling the Greek letter tau in the hands of medieval Irish and English writers. The Roman form is used in most printed material; it consists of a small loop with an arc over it ("a"). Both derive from the majuscule (capital) form. In Greek handwriting, it was common to join the left leg and horizontal stroke into a single loop, as demonstrated by the uncial version shown. Many fonts then made the right leg vertical. In some of these, the
serif In typography, a serif () is a small line or stroke regularly attached to the end of a larger stroke in a letter or symbol within a particular font or family of fonts. A typeface or "font family" making use of serifs is called a serif typeface ...
that began the right leg stroke developed into an arc, resulting in the printed form, while in others it was dropped, resulting in the modern handwritten form. Graphic designers refer to the ''Italic'' and ''Roman'' forms as "single decker a" and "double decker a" respectively. Italic type is commonly used to mark emphasis or more generally to distinguish one part of a text from the rest (set in Roman type). There are some other cases aside from italic type where ''script a'' ("ɑ"), also called Latin alpha, is used in contrast with Latin "a" (such as in the
International Phonetic Alphabet The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic transcription, phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standa ...
).


Use in writing systems


English

In modern English orthography, the letter represents at least seven different vowel sounds: *the
near-open front unrounded vowel The near-open front unrounded vowel, or near-low front unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , a lowercase of the ligature. Bot ...
as in ''pad''; *the
open back unrounded vowel The open back unrounded vowel, or low back unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , and the equivalent X-SAMPA symbol is A. The l ...
as in ''father'', which is closer to its original Latin and Greek sound; *the
diphthong A diphthong ( ; , ), also known as a gliding vowel, is a combination of two adjacent vowel sounds within the same syllable. Technically, a diphthong is a vowel with two different targets: that is, the tongue (and/or other parts of the speech o ...
as in ''ace'' and ''major'' (usually when is followed by one, or occasionally two, consonants and then another vowel letter) – this results from Middle English lengthening followed by the Great Vowel Shift; *the modified form of the above sound that occurs
before Before is the opposite of after, and may refer to: * ''Before'' (Gold Panda EP), 2009 * ''Before'' (James Blake EP), 2020 * "Before" (song), a 1996 song by the Pet Shop Boys * "Before", a song by the Empire of the Sun from ''Two Vines'' * "Befo ...
, as in ''square'' and ''Mary''; *the rounded vowel of ''water''; *the shorter rounded vowel (not present in General American) in ''was'' and ''what''; *a
schwa In linguistics, specifically phonetics and phonology, schwa (, rarely or ; sometimes spelled shwa) is a vowel sound denoted by the IPA symbol , placed in the central position of the vowel chart. In English and some other languages, it rep ...
, in many unstressed syllables, as in ''about'', ''comma'', ''solar''. The double sequence does not occur in native English words, but is found in some words derived from foreign languages such as ''Aaron'' and '' aardvark''. However, occurs in many common digraphs, all with their own sound or sounds, particularly , , , , and . is the third-most-commonly used letter in English (after and ) and
French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...
, the second most common in Spanish, and the most common in Portuguese. About 8.167% of letters used in English texts tend to be ; the number is around 7.636% in French, 11.525% in Spanish, and 14.634% for Portuguese.


Other languages

In most languages that use the Latin alphabet, denotes an open unrounded vowel, such as , , or . An exception is Saanich, in which (and the glyph Á) stands for a close-mid front unrounded vowel .


Other systems

In phonetic and phonemic notation: *in the
International Phonetic Alphabet The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic transcription, phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standa ...
, is used for the open front unrounded vowel, is used for the open central unrounded vowel, and is used for the
open back unrounded vowel The open back unrounded vowel, or low back unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , and the equivalent X-SAMPA symbol is A. The l ...
. *in X-SAMPA, is used for the open front unrounded vowel and is used for the
open back unrounded vowel The open back unrounded vowel, or low back unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , and the equivalent X-SAMPA symbol is A. The l ...
.


Other uses

In algebra, the letter ''a'' along with various other letters of the alphabet is often used to denote a variable, with various conventional meanings in different areas of mathematics. Moreover, in 1637, René Descartes "invented the convention of representing unknowns in equations by x, y, and z, and knowns by a, b, and c", and this convention is still often followed, especially in elementary algebra. In geometry, capital A, B, C etc. are used to denote segments,
line Line most often refers to: * Line (geometry), object with zero thickness and curvature that stretches to infinity * Telephone line, a single-user circuit on a telephone communication system Line, lines, The Line, or LINE may also refer to: Arts ...
s, rays, etc. A capital A is also typically used as one of the letters to represent an angle in a triangle, the lowercase a representing the side opposite angle A. "A" is often used to denote something or someone of a better or more prestigious quality or status: A−, A or A+, the best grade that can be assigned by teachers for students' schoolwork; "A grade" for clean restaurants; A-list celebrities, etc. Such associations can have a motivating effect, as exposure to the letter A has been found to improve performance, when compared with other letters. "A" is used as a prefix on some words, such as
asymmetry Asymmetry is the absence of, or a violation of, symmetry (the property of an object being invariant to a transformation, such as reflection). Symmetry is an important property of both physical and abstract systems and it may be displayed in pre ...
, to mean "not" or "without" (from Greek). In English grammar, "a", and its variant "an", is an
indefinite article An article is any member of a class of dedicated words that are used with noun phrases to mark the identifiability of the referents of the noun phrases. The category of articles constitutes a part of speech. In English, both "the" and "a(n)" ar ...
, used to introduce noun phrases. Finally, the letter A is used to denote size, as in a narrow size shoe, or a small cup size in a brassiere.


Related characters


Descendants and related characters in the Latin alphabet

*Æ æ : Latin ''AE'' ligature *A with
diacritic A diacritic (also diacritical mark, diacritical point, diacritical sign, or accent) is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek (, "distinguishing"), from (, "to distinguish"). The word ''diacriti ...
s: Å å Ǻ ǻ Ḁ ḁ
The modifier letter right half ring () is a character of the Unicode Spacing Modifier Letters range, used to transliterate: * the letter aleph * the Arabic letter hamza See also * Modifier letter left half ring * Half ring * Apostrophe * Glot ...
Ă ă Ặ ặ Ắ ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ȃ ȃ Â â Ậ ậ Ấ ấ Ầ ầ Ẫ ẫ Ẩ ẩ Ả ả Ǎ ǎ Ⱥ ⱥ Ȧ ȧ Ǡ ǡ Ạ ạ Ä ä Ǟ ǟ À à Ȁ ȁ Á á Ā ā Ā̀ ā̀ Ã ã Ą ą Ą́ ą́ Ą̃ ą̃ A̲ a̲
In phonetics, an r-colored or rhotic vowel (also called a retroflex vowel, vocalic r, or a rhotacized vowel) is a vowel that is modified in a way that results in a lowering in frequency of the third formant. R-colored vowels can be articulate ...
* Phonetic alphabet symbols related to A (the
International Phonetic Alphabet The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic transcription, phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standa ...
only uses lowercase, but uppercase forms are used in some other writing systems): **Ɑ ɑ : Latin letter alpha / script A, which represents an
open back unrounded vowel The open back unrounded vowel, or low back unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , and the equivalent X-SAMPA symbol is A. The l ...
in the IPA **ᶐ : Latin small letter alpha with retroflex hook **Ɐ ɐ : Turned A, which represents a
near-open central vowel The near-open central vowel, or near-low central vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , a rotated lowercase double-barrelled letter a. ...
in the IPA **Λ ʌ : Turned V (also called a wedge, a caret, or a hat), which represents an open-mid back unrounded vowel in the IPA **Ɒ ɒ : Turned alpha / script A, which represents an open back rounded vowel in the IPA **ᶛ : Modifier letter small turned alpha **ᴀ : Small capital A, an obsolete or non-standard symbol in the International Phonetic Alphabet used to represent various sounds (mainly open vowels) **A a ᵄ : Modifier letters are used in the Uralic Phonetic Alphabet (UPA) (sometimes encoded with Unicode subscripts and superscripts) **a : Subscript small a is used in Indo-European studies **ꬱ : Small letter a reversed-schwa is used in the
Teuthonista Teuthonista is a phonetic transcription system used predominantly for the transcription of (High) German dialects. It is very similar to other Central European transcription systems from the early 20th century. The base characters are mostly bas ...
phonetic transcription system **Ꞻ ꞻ : Glottal A, used in the transliteration of Ugaritic


Derived signs, symbols and abbreviations

*ª : an ordinal indicator *Å : Ångström sign *∀ : a turned capital letter A, used in predicate logic to specify universal quantification ("for all") *@ : At sign *₳ : Argentine austral *Ⓐ : anarchy symbol


Ancestors and siblings in other alphabets

*𐤀 :
Semitic Semitic most commonly refers to the Semitic languages, a name used since the 1770s to refer to the language family currently present in West Asia, North and East Africa, and Malta. Semitic may also refer to: Religions * Abrahamic religions ** ...
letter
Aleph Aleph (or alef or alif, transliterated ʾ) is the first letter of the Semitic abjads, including Phoenician , Hebrew , Aramaic , Syriac , Arabic ʾ and North Arabian 𐪑. It also appears as South Arabian 𐩱 and Ge'ez . These letter ...
, from which the following symbols originally derive **Α α : Greek letter
Alpha Alpha (uppercase , lowercase ; grc, ἄλφα, ''álpha'', or ell, άλφα, álfa) is the first letter of the Greek alphabet. In the system of Greek numerals, it has a value of one. Alpha is derived from the Phoenician letter aleph , whic ...
, from which the following letters derive ***А а :
Cyrillic , bg, кирилица , mk, кирилица , russian: кириллица , sr, ћирилица, uk, кирилиця , fam1 = Egyptian hieroglyphs , fam2 = Proto-Sinaitic , fam3 = Phoenician , fam4 = G ...
letter A *** :
Coptic Coptic may refer to: Afro-Asia * Copts, an ethnoreligious group mainly in the area of modern Egypt but also in Sudan and Libya * Coptic language, a Northern Afro-Asiatic language spoken in Egypt until at least the 17th century * Coptic alphabet ...
letter Alpha ***𐌀 : Old Italic A, which is the ancestor of modern Latin A **** : Runic letter
ansuz Ansuz is the conventional name given to the ''a''-rune of the Elder Futhark, . The name is based on Proto-Germanic ''* ansuz'', denoting a deity belonging to the principal pantheon in Germanic paganism. The shape of the rune is likely from N ...
, which probably derives from old Italic A *** : Gothic letter aza/asks *Ա ա : Armenian letter Ayb


Code points

These are the code points for the forms of the letter in various systems : 1


Other representations


Use as a number

In the
hexadecimal In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of 16. Unlike the decimal system representing numbers using 10 symbols, hexa ...
(base 16) numbering system, A is a number that corresponds to the number 10 in
decimal The decimal numeral system (also called the base-ten positional numeral system and denary or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral ...
(base 10) counting.


Notes


Footnotes


References

* * * * * * * * *


External links


History of the Alphabet
* {{Authority control ISO basic Latin letters Vowel letters