/ Dictionary / Index T triploid: Meaning and Definition of Find definitions for: trip•loid Pronunciation: (trip'loid), [key] — Biol. Biol. —adj. having a chromosome number that is three times the basic or haploid number. —n. a triploid cell or organism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: triploid (Thesaurus) triploblastic triply Related Content Daily Word Quiz: ravenous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language