/ Dictionary / Index A arsine: Meaning and Definition of Find definitions for: ar•sine Pronunciation: (är-sēn', är'sēn, -sin), [key] — n. Chem. Also calleda colorless, flammable, slightly water-soluble gas, AsH, having a fetid, garliclike odor, used in chemical warfare. any derivative of this compound in which one or more hydrogen atoms are replaced by organic groups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arsine (Thesaurus) arshin arsino Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language