(Zool.) Any one of the numerous species of reptiles belonging to the order Lacertilia; sometimes, also applied to reptiles of other orders, as the Hatteria. Note: Most lizards have an elongated body, with four legs, and a long tail; but there are some without legs, and some with a short, thick tail. Most have scales, but some are naked; most have eyelids, but some do not. The tongue is varied in form and structure. In some it is forked, in others, as the chameleons, club-shaped, and very extensible. See Amphisbaena, Chameleon, Gecko, Gila monster, Horned toad, Iguana, and Dragon, 6.