/ Dictionary / Index A allyl mercaptan: Meaning and Definition of Find definitions for: al'lyl mercap'tan Pronunciation: [key] — Chem. Chem. a colorless liquid, CHS, having a strong, garlicky odor, used in the manufacture of pharmaceuticals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. allylic allyl resin Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language