/ Dictionary / Index A alkyl: Meaning and Definition of Find definitions for: al•kyl Pronunciation: (al'kul), [key] — Chem. Chem. —adj. containing an alkyl group. —n. an alkyl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alkyl (Thesaurus) alkyd alkylate Related Content Daily Word Quiz: stellar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language