/ Dictionary / Index M Moissan: Meaning and Definition of Find definitions for: Mois•san Pronunciation: (mwa-sän'), [key] 1852–1907, French chemist: Nobel prize 1906. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Moiseyev moist Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language