a combining form meaning “egg,” used in the formation of compound words: oogamous.
Are There Any Words That Use “W” As A Vowel?“Cwm” (a steep-walled semicircular basin in a mountain, sometimes containing a lake; a cirque) and “crwth” (an ancient Celtic musical instrument), both from the Welsh, use w as a vowel – standing for the same sound that oo stands for in boom and booth. “Crwth” is also spelled “crowd.” However, in words like “low” and “bow,” one can make a good case that the letter w represents a vowel. Both of these words end …
Origin of oo-
< Greek ōio-, combining form of ōión egg1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for oo-
egg or ovumoosperm
Word Origin for oo-
from Greek ōion egg 1
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 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
Medicine definitions for oo-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.