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Omicron (uppercase ?, lowercase ?, literally "small o" : ?µ?????, o mikron, micron meaning 'small' in contrast to omega) is the 15th letter of the Greek alphabet. In the system of Greek numerals it has a value of 70. It is rarely used in mathematics because it is indistinguishable from the Latin letter O and easily confused with the digit 0. This letter is equal to the Phoenician letter Ayin. In modern Greek, Omicron represents the sound IPA2 ??. Letters that arose from omicron include Roman O and Cyrillic O.
In Unicode the capital letter is codepoint U+039F and the lowercase is U+03BF.
The upper-case letter of omicron (O) was originally used as a symbol for Big O notation, representing the asymptotic rate of growth of a function in mathematics.
In Popular Culture - Omicron is used as the name of a planet in Futurama, "Omicron Persei 8", which is populated by large angry aliens.
Category:Greek letters Category:Vowel letters Category:Articles lacking sources (Erik9bot)
writingsystem-stub
als:? ar:???????? arc:? br:Omikron (lizherenn) bg:??????? ca:Òmicron cs:Omikron cy:Omicron da:Omikron de:Omikron el:?µ????? es:? eo:Omikrono eu:Omikron fa:??????? (???) fr:Omicron ga:Oimeacrón gd:Omicron gl:Omicrón ko:? hr:Omikron id:Omikron is:Ómíkron it:Omicron (lettera) he:???????? ka:???????? (???) ht:? ku:Omikron la:Omicron lt:Omikron (raide) hu:Omikron ms:Omikron nah:? nl:Omikron ja:? no:Omikron nn:Omikron nds:Omikron pl:Omikron pt:? ru:??????? (?????) simple:Omicron sk:Omikrón sl:Omikron sh:Omikron fi:Omikron sv:Omikron th:???????? tr:? uk:??????? (??????) wuu:? zh-yue:? zh:?
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