/ Dictionary / Index E endothelioid: Meaning and Definition of Find definitions for: en•do•the•li•oid Pronunciation: (en"dō-thē'lē-oid"), [key] — adj. resembling endothelium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. endothecium endothelioma Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language