/ Dictionary / Index T triserial: Meaning and Definition of Find definitions for: tri•se•ri•al Pronunciation: (trī-sēr'ē-ul), [key] — adj. arranged in three series or rows. having only three verticils. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triseptate trishaw Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language