/ Dictionary / Index M mescal button: Meaning and Definition of Find definitions for: mescal' but"ton Pronunciation: [key] one of the dried, buttonlike tops of a mescal of the genus Lophophora, used as a hallucinogen, esp. by certain Indians of Mexico and the southwestern U.S. during religious ceremonies; peyote. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mescal bean Mescalero Related Content Daily Word Quiz: abscond Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language