/ 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: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language