Irregular, irregulars or irregularity may refer to any of the following:
Astronomy
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Irregular galaxy
An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearanc ...
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Irregular moon
In astronomy, an irregular moon, irregular satellite or irregular natural satellite is a natural satellite following a distant, inclined, and often eccentric and retrograde orbit. They have been captured by their parent planet, unlike regular sat ...
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Irregular variable
An irregular variable is a type of variable star in which variations in brightness show no regular periodicity. There are two main sub-types of irregular variable: eruptive and pulsating.
Eruptive irregular variables are divided into three categor ...
, a kind of star
Language
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Irregular inflection, the formation of derived forms such as plurals in unpredictable ways
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Irregular verb
A regular verb is any verb whose conjugation follows the typical pattern, or one of the typical patterns, of the language to which it belongs. A verb whose conjugation follows a different pattern is called an irregular verb. This is one instance ...
Law
* Against
regulation
Regulation is the management of complex systems according to a set of rules and trends. In systems theory, these types of rules exist in various fields of biology and society, but the term has slightly different meanings according to context. For ...
s
* In canon law, an
irregularity is an impediment for the Catholic priesthood or for exercising orders already received
Mathematics
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Irregularity of a surface In mathematics, the irregularity of a complex surface ''X'' is the Hodge number h^= \dim H^1(\mathcal_X), usually denoted by ''q.'' The irregularity of an algebraic surface is sometimes defined to be this Hodge number, and sometimes defined to be ...
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Irregularity of distributions The irregularity of distributions problem, stated first by Hugo Steinhaus, is a numerical problem with a surprising result. The problem is to find ''N'' numbers, x_1,\ldots,x_N, all between 0 and 1, for which the following conditions hold:
* The f ...
*
Irregularity index
In number theory, a regular prime is a special kind of prime number, defined by Ernst Kummer in 1850 to prove certain cases of Fermat's Last Theorem. Regular primes may be defined via the divisibility of either class numbers or of Bernoulli num ...
Medicine
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Irregular bone
The irregular bones are bones which, from their peculiar form, cannot be grouped as long, short, flat or sesamoid bones. Irregular bones serve various purposes in the body, such as protection of nervous tissue (such as the vertebrae protect th ...
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Arrhythmia
Arrhythmias, also known as cardiac arrhythmias, heart arrhythmias, or dysrhythmias, are irregularities in the heartbeat, including when it is too fast or too slow. A resting heart rate that is too fast – above 100 beats per minute in adults ...
, also known as an irregular heartbeat
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Constipation
Constipation is a bowel dysfunction that makes bowel movements infrequent or hard to pass. The stool is often hard and dry. Other symptoms may include abdominal pain, bloating, and feeling as if one has not completely passed the bowel movement ...
, also called "irregularity"
Other
* ''
The Irregulars
''The Irregulars'' is a British mystery adventure crime drama streaming television series created by Tom Bidwell for Netflix. Based on the works of Sir Arthur Conan Doyle, it features the Baker Street Irregulars working for Dr. Watson saving L ...
'', a 2021 Netflix series
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Accounting irregularity
An accounting irregularity is an entry or statement that does not conform to the normal laws, practises and rules of the accounting profession, having the deliberate intent to deceive or defraud. Accounting irregularities can consist of intentiona ...
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Irregular military
Irregular military is any non-standard military component that is distinct from a country's national armed forces. Being defined by exclusion, there is significant variance in what comes under the term. It can refer to the type of military orga ...
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Irregular chess opening
In chess, irregular opening is a traditional term for any opening considered unusual or unorthodox. In the early 19th century it was used for any opening not beginning with 1.e4 e5 (the Open Game) or 1.d4 d5 (the Closed Game). As opening theory h ...
See also
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Anomaly (disambiguation)
Anomaly may refer to:
Science
Natural
* Anomaly (natural sciences)
**Atmospheric anomaly
**Geophysical anomaly
Medical
*Congenital anomaly (birth defect), a disorder present at birth
** Physical anomaly, a deformation of an anatomical structur ...
*
Baker Street Irregulars
The Baker Street Irregulars are fictional characters who appear in three Sherlock Holmes stories, specifically two novels and one short story, by Arthur Conan Doyle. They are street boys who are employed by Holmes as intelligence agents. The na ...
*
Regular (disambiguation)
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