a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...

Collins

World English Dictionary

omega (ˈəʊmɪɡə)

—n
1.	the 24th and last letter of the Greek alphabet (Ω, ω), a long vowel, transliterated as o or ō
2.	the ending or last of a series

[C16: from Greek ō mega big o; see mega-, omicron]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source

Etymonline

Word Origin & History

omega

c.1400, from Medieval Gk. omega, final letter of the Gk. alphabet (cf. Rev. i.8), from classical Gk. o mega "big 'o' " (in contrast to o micron "little 'o' "); so called because the vowel was long in ancient Gk.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

American Heritage

Medical Dictionary

omega o·me·ga (ō-měg'ə, ō-mē'gə, ō-mā'-)
n.

Symbol ω, Ω The 24th letter of the Greek alphabet. adj.
Of or characterizing a chemical group or position at the end of a molecular chain, such as omega-oxidation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

American Heritage

Science Dictionary

omega (ō-měg'ə, ō-mē'gə, ō-mā'-) Pronunciation Key

An omega baryon.
An omega meson.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

FOLDOC

Computing Dictionary

Omega definition

1. A prototype-based object-oriented language from Austria.
["Type-Safe Object-Oriented Programming with Prototypes - The Concept of Omega", G. Blaschek, Structured Programming 12:217-225, 1991].
2. A successor to TeX extended to handle the Unicode character set.
(http://ens.fr/omega/).
(1997-11-20)

Easton

Bible Dictionary