Omicron  

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Omicron Template:IPAc-en (uppercase Ο, lowercase ο, literally 'small o': Template:Lang < Template:Lang - Template:Lang, 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. This letter is derived from the Phoenician letter ayin Image:Phoenician ayin.svg. In classical Greek, omicron represented the sound Template:IPAblink in contrast to omega Template:IPA and ου Template:IPA. In modern Greek, omicron represents the mid back rounded vowel Template:IPA, the same sound as omega. Letters that arose from omicron include Roman O and Cyrillic O.

The upper-case letter of omicron (O) was originally used in mathematics as a symbol for Big O notation (representing a function's asymptotic growth rate), but has fallen out of favor because omicron is indistinguishable from the Latin letter O and easily confused with the digit zero (0).


Unless indicated otherwise, the text in this article is either based on Wikipedia article "Omicron" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on research by Jahsonic and friends. See Art and Popular Culture's copyright notice.

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