/ Dictionary / Index T tetrafunctional: Meaning and Definition of Find definitions for: tet•ra•func•tion•al Pronunciation: (te"tru-fungk'shu-nl), [key] — adj. Chem. pertaining to molecules or groups that can bond at four sites. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetrafluoroethylene tetragon Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language