Omicron
166738
221777611
2008-06-26T01:39:06Z
86.136.217.2
{{wiktionarypar2|Ο|ο}}
{{Table_Greekletters|letter=omicron}}
'''Omicron''' (uppercase '''Ο''', lowercase '''ο''', literally "small o" :''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 alphabet|Latin]] letter [[O]] and easily confused with the [[Numerical digit|digit]] [[0 (number)|0]]. This letter is equal to the Phoenician letter Ayin. In [[modern Greek]], Omicron represents the sound {{IPA2|ɔː}}.
In [[Unicode]] the [[majuscule|capital]] letter is codepoint U+039F and the [[Lower case|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.
[[Category:Greek letters]]
[[Category:Vowel letters]]
{{writingsystem-stub}}
[[als:Ο]]
[[ar:أوميكرون (حرف إغريقي)]]
[[arc:Ο]]
[[br:Omikron (lizherenn)]]
[[bg:Омикрон]]
[[ca:Òmicron]]
[[cy:Omicron]]
[[da:Omikron]]
[[de:Omikron]]
[[el:Όμικρον]]
[[es:Ο]]
[[eo:Omikrono]]
[[eu:Omicron]]
[[fr:Omicron]]
[[ga:Oimeacrón]]
[[gd:Omicron]]
[[gl:Omicrón]]
[[ko:Ο]]
[[hr:Omikron]]
[[id:Omikron]]
[[is:Ómíkron]]
[[it:Omicron (lettera)]]
[[he:אומיקרון]]
[[ka:ომიკრონი (ასო)]]
[[ht:Ο]]
[[ku:Omikron]]
[[la:Omicron]]
[[lt:Omikron (raidė)]]
[[hu:Omikron]]
[[ms:Omikron]]
[[nah:Ο]]
[[nl:Omikron]]
[[ja:Ο]]
[[no:Omikron]]
[[nn:Omikron]]
[[nds:Omikron]]
[[pl:Omikron]]
[[pt:Ο]]
[[ru:Омикрон (буква)]]
[[simple:Omicron]]
[[sk:Omikrón]]
[[sl:Omikron]]
[[sh:Omikron]]
[[fi:Omikron]]
[[sv:Omikron]]
[[th:โอไมครอน]]
[[tr:Ο]]
[[uk:Омікрон (літера)]]
[[zh:Ο]]