/ Dictionary / Index L lingual brace: Meaning and Definition of Find definitions for: lin'gual brace' Pronunciation: [key] — Orthodontics. Orthodontics. a specialized dental brace that fits behind the teeth so that it is not visible when the wearer speaks or smiles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lingual lingual protrusion lisp Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language