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ornitho-

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  1. a combining form meaning “bird,” used in the formation of compound words: ornithology.
Also especially before a vowel, ornith-.

Origin of ornitho-

combining form representing Greek ornīth- (stem of órnīs) bird
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for ornitho-

ornitho-

before a vowel ornith-

combining form
  1. bird or birdsornithology; ornithomancy; ornithopter; ornithoscopy; ornithosis

Word Origin

from Greek 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-

before vowels 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