Breadcrumb Home > Dictionary > Index M Mexican onyx: Meaning and Definition of Find definitions for: Mex'ican on'yx Pronunciation: [key] a translucent, banded variety of calcite, used for ornamental and decorative pieces. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mexicano Mexican orange ✖ Related Content Daily Word Quiz: sophism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language