/ Dictionary / Index L leontiasis: Meaning and Definition of Find definitions for: le•on•ti•a•sis Pronunciation: (lē"un-tī'u-sis), [key] — n. Pathol. a lionlike facial distortion. Also calledan overgrowth of the cranial and facial bones resulting in a lionlike appearance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Leonov Leontief Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language