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Azimuthal Quantum Number
The azimuthal quantum number is a quantum number for an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital. The azimuthal quantum number is the second of a set of quantum numbers that describe the unique quantum state of an electron (the others being the principal quantum number, the magnetic quantum number, and the spin quantum number). It is also known as the orbital angular momentum quantum number, orbital quantum number or second quantum number, and is symbolized as ℓ (pronounced ''ell''). Derivation Connected with the energy states of the atom's electrons are four quantum numbers: ''n'', ''ℓ'', ''m''''ℓ'', and ''m''''s''. These specify the complete, unique quantum state of a single electron in an atom, and make up its wavefunction or ''orbital''. When solving to obtain the wave function, the Schrödinger equation reduces to three equations that lead to the first three quantum numbers. Therefore, the equations for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velarized Alveolar Lateral Approximant
The voiced alveolar lateral approximant is a type of consonantal sound used in many spoken languages. The symbol in the International Phonetic Alphabet that represents dental, alveolar, and postalveolar lateral approximants is , and the equivalent X-SAMPA symbol is . As a sonorant, lateral approximants are nearly always voiced. Voiceless lateral approximants, are common in Sino-Tibetan languages, but uncommon elsewhere. In such cases, voicing typically starts about halfway through the hold of the consonant. No language is known to contrast such a sound with a voiceless alveolar lateral fricative . In a number of languages, including most varieties of English, the phoneme becomes velarized (" dark ''l''") in certain contexts. By contrast, the non-velarized form is the "clear ''l''" (also known as: "light ''l''"), which occurs before and between vowels in certain English standards. Some languages have only clear ''l''. Others may not have a clear ''l'' at all, or have t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 standardized representation of speech sounds in written form.International Phonetic Association (IPA), ''Handbook''. The IPA is used by lexicography, lexicographers, foreign language students and teachers, linguistics, linguists, speech–language pathology, speech–language pathologists, singers, actors, constructed language creators, and translators. The IPA is designed to represent those qualities of speech that are part of wiktionary:lexical, lexical (and, to a limited extent, prosodic) sounds in oral language: phone (phonetics), phones, phonemes, Intonation (linguistics), intonation, and the separation of words and syllables. To represent additional qualities of speech—such as tooth wiktionary:gnash, gnashing, lisping, and sounds made wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logographic
In a written language, a logogram, logograph, or lexigraph is a written character that represents a word or morpheme. Chinese characters (pronounced '' hanzi'' in Mandarin, ''kanji'' in Japanese, ''hanja'' in Korean) are generally logograms, as are many hieroglyphic and cuneiform characters. The use of logograms in writing is called ''logography'', and a writing system that is based on logograms is called a ''logography'' or ''logographic system''. All known logographies have some phonetic component, generally based on the rebus principle. Alphabets and syllabaries are distinct from logographies in that they use individual written characters to represent sounds directly. Such characters are called ''phonograms'' in linguistics. Unlike logograms, phonograms do not have any inherent meaning. Writing language in this way is called ''phonemic writing'' or ''orthographic writing''. Etymology Doulgas Harper's Online Etymology Dictionary states that the term 'logogram' was derived f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alveolar Lateral Approximant
The voiced alveolar lateral approximant is a type of consonantal sound used in many spoken languages. The symbol in the International Phonetic Alphabet that represents dental, alveolar, and postalveolar lateral approximants is , and the equivalent X-SAMPA symbol is . As a sonorant, lateral approximants are nearly always voiced. Voiceless lateral approximants, are common in Sino-Tibetan languages, but uncommon elsewhere. In such cases, voicing typically starts about halfway through the hold of the consonant. No language is known to contrast such a sound with a voiceless alveolar lateral fricative . In a number of languages, including most varieties of English, the phoneme becomes velarized (" dark ''l''") in certain contexts. By contrast, the non-velarized form is the "clear ''l''" (also known as: "light ''l''"), which occurs before and between vowels in certain English standards. Some languages have only clear ''l''. Others may not have a clear ''l'' at all, or have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Alveolar Approximant
The voiced alveolar lateral approximant is a type of consonantal sound used in many spoken languages. The symbol in the International Phonetic Alphabet that represents dental, alveolar, and postalveolar lateral approximants is , and the equivalent X-SAMPA symbol is . As a sonorant, lateral approximants are nearly always voiced. Voiceless lateral approximants, are common in Sino-Tibetan languages, but uncommon elsewhere. In such cases, voicing typically starts about halfway through the hold of the consonant. No language is known to contrast such a sound with a voiceless alveolar lateral fricative . In a number of languages, including most varieties of English, the phoneme becomes velarized (" dark ''l''") in certain contexts. By contrast, the non-velarized form is the "clear ''l''" (also known as: "light ''l''"), which occurs before and between vowels in certain English standards. Some languages have only clear ''l''. Others may not have a clear ''l'' at all, or have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alphabet
An alphabet is a standardized set of basic written graphemes (called letters) that represent the phonemes of certain spoken languages. Not all writing systems represent language in this way; in a syllabary, each character represents a syllable, and logographic systems use characters to represent words, morphemes, or other semantic units. The first fully phonemic script, the Proto-Sinaitic script, later known as the Phoenician alphabet, is considered to be the first alphabet and is the ancestor of most modern alphabets, including Arabic, Cyrillic, Greek, Hebrew, Latin, and possibly Brahmic. It was created by Semitic-speaking workers and slaves in the Sinai Peninsula (as the Proto-Sinaitic script), by selecting a small number of hieroglyphs commonly seen in their Egyptian surroundings to describe the sounds, as opposed to the semantic values of the Canaanite languages. However, Peter T. Daniels distinguishes an abugida, a set of graphemes that represent consonantal base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cattle Prod
A cattle prod, also called a stock prod or a hot stick, is a handheld device commonly used to make cattle or other livestock move by striking or poking them. An electric cattle prod is a stick with electrodes on the end which is used to make cattle move via a relatively high-voltage, low-current electric shock. The electric cattle prod is said to have been invented by Texas cattle baron Robert J. Kleberg, Jr. of the King Ranch around 1930, although versions were sold as early as 1917. Electric prods A hotshot is typically cylindrical, and can carry an open electric current at the "shock end" when activated. The electric current at the shock end runs through two metal electrodes. Anything that touches the electric current receives a high-voltage low-current shock, not strong enough to kill a human or a large animal such as a cow or sheep from short-term exposure, but strong enough to cause significant pain. The electric cattle prod is designed to inflict a painful shock to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latin Alphabet
The Latin alphabet or Roman alphabet is the collection of letters originally used by the ancient Romans to write the Latin language. Largely unaltered with the exception of extensions (such as diacritics), it used to write English and the other modern European languages. With modifications, it is also used for other alphabets, such as the Vietnamese alphabet. Its modern repertoire is standardised as the ISO basic Latin alphabet. Etymology The term ''Latin alphabet'' may refer to either the alphabet used to write Latin (as described in this article) or other alphabets based on the Latin script, which is the basic set of letters common to the various alphabets descended from the classical Latin alphabet, such as the English alphabet. These Latin-script alphabets may discard letters, like the Rotokas alphabet, or add new letters, like the Danish and Norwegian alphabets. Letter shapes have evolved over the centuries, including the development in Medieval Latin of lower-case, fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lambda Uc Lc
Lambda (}, ''lám(b)da'') is the 11th letter of the Greek alphabet, representing the voiced alveolar lateral approximant . In the system of Greek numerals, lambda has a value of 30. Lambda is derived from the Phoenician Lamed . Lambda gave rise to the Latin L and the Cyrillic El (Л). The ancient grammarians and dramatists give evidence to the pronunciation as () in Classical Greek times. In Modern Greek, the name of the letter, Λάμδα, is pronounced . In early Greek alphabets, the shape and orientation of lambda varied. Most variants consisted of two straight strokes, one longer than the other, connected at their ends. The angle might be in the upper-left, lower-left ("Western" alphabets) or top ("Eastern" alphabets). Other variants had a vertical line with a horizontal or sloped stroke running to the right. With the general adoption of the Ionic alphabet, Greek settled on an angle at the top; the Romans put the angle at the lower-left. The HTML 4 character entity ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
