/ Dictionary / Index L lacertilian: Meaning and Definition of Find definitions for: lac•er•til•i•an Pronunciation: (las"ur-til'ē-un, -til'yun), [key] — adj. belonging or pertaining to the reptilian suborder Lacertilia, comprising the lizards. —n. a lacertilian reptile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lacertilian (Thesaurus) lacertid lace stay Related Content Daily Word Quiz: circumspect Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language