/ Dictionary / Index O ornithology: Meaning and Definition of Find definitions for: or•ni•thol•o•gy Pronunciation: (ôr"nu-thol'u-jē), [key] — n. the branch of zoology that deals with birds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ornithology (Thesaurus) ornithol. ornithopod Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language