/ Dictionary / Index R rhomboid: Meaning and Definition of Find definitions for: rhom•boid Pronunciation: (rom'boid), [key] — n. an oblique-angled parallelogram with only the opposite sides equal. rhomboideus. —adj. having a form like or similar to that of a rhombus; shaped like a rhomboid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rhomboid (Thesaurus) rhombohedron rhomboideus Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language