/ Dictionary / Index L labio-: Meaning and Definition of Find definitions for: labio- Pronunciation: [key] a combining form meaning “lip,” used in the formation of compound words: labiodental. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. labilize labiodental Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language