/ Dictionary / Index T tephrite: Meaning and Definition of Find definitions for: teph•rite Pronunciation: (tef'rīt), [key] — n. Petrog. a basaltic rock consisting essentially of pyroxene and plagioclase with nepheline or leucite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tephra tephrochronology 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