follow Dictionary.com

Is irregardless a word?

omicron

[om-i-kron, oh-mi-] /ˈɒm ɪˌkrɒn, ˈoʊ mɪ-/
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 Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for omicron
Historical Examples
  • At all events, it was not possible for him to think of anything bad when he called “omicron.”

    Walter Pieterse Multatuli
  • Mira, (omicron Ceti,) in the neck of the Whale, is a variable star.

    Letters on Astronomy Denison Olmsted
  • Another very interesting class of variables is known as the omicron Ceti type.

    Astronomy David Todd
  • Newton presented him with one of his publications, entitled "omicron."

  • The fore-paws are drawn up to the breast and represented by the stars Zi and omicron.

    Astronomy with an Opera-glass Garrett Putman Serviss
  • omicron must show her face in the stars from time to time to remind the child of his love.

    Walter Pieterse Multatuli
  • The boys straddled proudly, their small legs jutting wide apart, on the huge slanting shoulders of "omicron" or "Proud Aleck."

    Shadows of Flames Amelie Rives
  • And then, on the following morning, Sir omicron also went his way.

    Doctor Thorne Anthony Trollope
  • One of the most interesting of variable stars is that known as omicron Ceti, whose period of change is about 331 days.

    Aether and Gravitation William George Hooper
  • The spectrum of omicron Ceti contains many very bright lines, and a large proportion of the variable stars are of this type.

    Astronomy David Todd
British Dictionary definitions for omicron

omicron

/əʊˈmaɪkrɒn; ˈɒmɪkrɒn/
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
Cite This Source
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
Cite This Source
omicron in Medicine

omicron om·i·cron (ŏm'ĭ-krŏn', ō'mĭ-)
n.

Symbol o 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.
Cite This Source

Word of the Day

Difficulty index for omicron

Few English speakers likely know this word

Word Value for omicron

11
14
Scrabble Words With Friends

Nearby words for omicron