- a combining form meaning “egg,” used in the formation of compound words: oogamous.
Origin of oo-
< Greek ōio-, combining form of ōión egg1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- egg or ovumoosperm
from Greek ōion egg 1
Word Origin and History for oo-
word-forming element meaning "egg, eggs," from Greek oon "egg," cognate with Latin ovum, Old Norse egg (see egg (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
- Egg; ovum:oogenesis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.