/ Dictionary / Index D diploid: Meaning and Definition of Find definitions for: dip•loid Pronunciation: (dip'loid), [key] — adj. double; twofold. having two similar complements of chromosomes. —n. an organism or cell having double the basic haploid number of chromosomes. a solid belonging to the isometric system and having 24 trapezoidal planes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diploid (Thesaurus) diploë diploma Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language