oo-

oo-

a combining form meaning “egg,” used in the formation of compound words: oogamous.

Origin:
< Greek ōio-, combining form of ōión egg1

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Collins
World English Dictionary
oo- or oö-
 
combining form
egg or ovum: oosperm
 
[from Greek ōionegg1]
 
oö- or oö-
 
combining form
 
[from Greek ōionegg1]

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

oo-
comb. form meaning "egg, eggs," from Gk. oon "egg," cognate with L. ovum, O.N. egg (see egg (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

oo- pref.
Egg; ovum: oogenesis.

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