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omicron

[om-i-kron, oh-mi-]
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noun
  1. the 15th letter of the Greek alphabet (O, o).
  2. the vowel sound represented by this letter.

Origin of omicron

< Greek ō mikrón, literally, small o. Cf. omega
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for omicron

Historical Examples

  • Mira, (Omicron Ceti,) in the neck of the Whale, is a variable star.

    Letters on Astronomy

    Denison Olmsted

  • Newton presented him with one of his publications, entitled "Omicron."

  • At all events, it was not possible for him to think of anything bad when he called “Omicron.”

  • Omicron must show her face in the stars from time to time to remind the child of his love.

  • And then, on the following morning, Sir Omicron also went his way.

    Doctor Thorne</p>

    Anthony Trollope


British Dictionary definitions for omicron

omicron

noun
  1. the 15th letter in the Greek alphabet (Ο, ο), a short vowel, transliterated as o

Word Origin

from Greek ō mikron small o; see micro-, omega
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for omicron

15th letter of the Greek alphabet, literally "small 'o,' " from Greek (s)mikros "small," from PIE *smik-. Because the vowel was "short" in ancient Greek. Cf. Omega.

Online Etymology Dictionary, © 2010 Douglas Harper

omicron in Medicine

omicron

([object Object])
n.
  1. The 15th letter of the Greek alphabet.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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