Source : Webster's Revised Unabridged Dictionary (1913)

Lacertilia \Lac`er*til"i*a\, n. pl. [NL., fr. L. lacertus a
   lizard.] (Zo["o]l.)
   An order of Reptilia, which includes the lizards.

   Note: They are closely related to the snakes, and life the
         latter, usually have the body covered with scales or
         granules. They usually have eyelids, and most of then
         have well-formed legs; but in some groups
         (amphisb[ae]na, glass-snake, etc.) the legs are wanting
         and the body is serpentlike. None are venomous, unless
         {Heloderma} be an exception. The order includes the
         chameleons, the {Cionocrania}, or typical lizards, and
         the amphisb[ae]nas. See {Amphisb[ae]na}, {Gecko}, {Gila
         monster}, and {Lizard}.

Source : WordNet®

Lacertilia
     n : true lizards; including chameleons and geckos [syn: {Sauria},
          {suborder Sauria}, {suborder Lacertilia}]