/ Dictionary / Index R rhombic: Meaning and Definition of Find definitions for: rhom•bic Pronunciation: (rom'bik), [key] — adj. having the form of a rhombus. having a rhombus as base or cross section. bounded by rhombuses, as a solid. orthorhombic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rhombic (Thesaurus) rhombencephalon rhombohedron Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language