/ Dictionary / Index X xenocryst: Meaning and Definition of Find definitions for: xen•o•cryst Pronunciation: (zen'u-krist, zē'nu-), [key] — n. Mineral. a rock or crystal engulfed by magma and retained as an inclusion in the resulting igneous rock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Xenocrates xenocurrency Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language