/ Dictionary / Index O oology: Meaning and Definition of Find definitions for: o•ol•o•gy Pronunciation: (ō-ol'u-jē), [key] — n. the branch of ornithology that studies birds' eggs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oology (Thesaurus) oolith oolong Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language