/ Dictionary / Index T trachybasalt: Meaning and Definition of Find definitions for: tra•chy•ba•salt Pronunciation: (trā"kē-bu-sôlt', -bas'ôlt, -bā'sôlt, trak"ē-), [key] — n. a fine-grained volcanic rock containing sanidine and calcic plagioclase. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trachy- trachycarpous Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language