/ Dictionary / Index T tetryl: Meaning and Definition of Find definitions for: tet•ryl Pronunciation: (te'tril), [key] — n. Chem. a yellow, crystalline, water-insoluble solid, CHNO, used as a chemical indicator and as a detonator and bursting charge in small-caliber shells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tetryl (Thesaurus) tetroxide tetrytol Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language