/ Dictionary / Index I ilium: Meaning and Definition of Find definitions for: il•i•um Pronunciation: (il'ē-um), [key] — pl. il•i•a the broad, upper portion of either hipbone. See diag. under Il•i•um Pronunciation: (il'ē-um), [key] — n. Latin name of ancient Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ilium (Thesaurus) -ility ilk Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language