/ Dictionary / Index A adamsite: Meaning and Definition of Find definitions for: ad•ams•ite Pronunciation: (ad'um-zīt"), [key] — n. Chem., Mil. a yellow irritant smoke, containing a poisonous form of arsenic and used as a harassing agent. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Adam's cup Adam's-needle Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language