/ Dictionary / Index D Doisy: Meaning and Definition of Find definitions for: Doi•sy Pronunciation: (doi'zē), [key] born 1893, U.S. biochemist: Nobel prize for medicine 1943. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. doing doit Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language