/ Dictionary / Index T triphibious: Meaning and Definition of Find definitions for: tri•phib•i•ous Pronunciation: (trī-fib'ē-us), [key] — adj. employing or involving land, naval, and air forces in a combined operation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triphibian triphosphate 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