/ Dictionary / Index T tetraethyl: Meaning and Definition of Find definitions for: tet•ra•eth•yl Pronunciation: (te"tru-eth'ul), [key] — adj. Chem. containing four ethyl groups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetradynamous tetraethyllead Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language