- Omicron
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This article is about the Greek letter Ο. For the genus of the same name, see Omicron (genus). For video game, see Omikron: The Nomad Soul.
Greek alphabet Αα Alpha Νν Nu Ββ Beta Ξξ Xi Γγ Gamma Οο Omicron Δδ Delta Ππ Pi Εε Epsilon Ρρ Rho Ζζ Zeta Σσς Sigma Ηη Eta Ττ Tau Θθ Theta Υυ Upsilon Ιι Iota Φφ Phi Κκ Kappa Χχ Chi Λλ Lambda Ψψ Psi Μμ Mu Ωω Omega History Archaic local variants
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Ligatures (ϛ, ȣ, ϗ) · Diacritics Numerals: 
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(900)In other languages Bactrian · Coptic · Albanian Scientific symbols
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Commons
Omicron (uppercase Ο, lowercase ο, literally "small o": Όμικρον, 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 derived from the Phoenician letter Ayin. In modern Greek, omicron represents the sound [ɔ]. 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 in mathematics as a symbol for Big O notation, representing the asymptotic rate of growth of a function.
In popular culture
- Omicron is frequently used to designate the thirteenth star in a constellation group, using a combination of magnitude and position.[1] Stars with the omicron designation include Omicron Andromedae, Omicron Ceti, and Omicron Persei. The last of these is well-known due to its use as a setting in science fiction, including Star Trek, Mystery Science Theater 3000, Transformers, and Futurama.
References
Categories:- Greek letters
- Vowel letters
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