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a combining form meaning “bird,” used in the formation of compound words:
Also, especially before a vowel, ornith-.
Origin of ornitho-
combining form representing Greek ornīth- (stem of órnīs) bird Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for ornitho-


combining form
bird or birds: ornithology, 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
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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
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