/ Dictionary / Index C conchoidal: Meaning and Definition of Find definitions for: con•choi•dal Pronunciation: (kong-koid'l), [key] — adj. Mineral. noting a shell-like fracture form produced on certain minerals by a blow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. conchoid conchology Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language