Word Origin a combining form meaning “bird,” used in the formation of compound words: ornithology.
especially before a vowel
Origin of ornitho-
combining form representing
Greek ornīth- (stem of órnīs) bird
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for ornitho- ornitho- before a vowel ornith- bird or birds ornithology; ornithomancy; ornithopter; ornithoscopy; ornithosis Word Origin for ornitho-
ornis, ornith- bird
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 ornitho-
ornith-, word-forming element meaning "bird, birds," from comb. form of Greek ornis (genitive ornithos) "a bird" (in Attic generally "domestic fowl"), often added to the specific name of the type of bird, from PIE *or- "large bird" (see erne).
Online Etymology Dictionary, © 2010 Douglas Harper