/ Dictionary / Index I Ischys: Meaning and Definition of Find definitions for: Is•chys Pronunciation: (is'kis), [key] — n. Class. Myth. a youth who was slain after committing an act of infidelity with Coronis, the beloved of Apollo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ischium -ise Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language