The Collaborative International Dictionary of English v.0.48:

Chamaeleonidae \Chamaeleonidae\, Chamaeleontidae
\Chamaeleontidae\n.
   a natural family comprising the Old World chameleons; in some
   classifications Rhiptoglossa is considered a superfamily of
   Sauria.

   Syn: family Chamaeleontidae, family Chamaeleonidae,
        Rhiptoglossa, family Rhiptoglossa.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Chamaeleontidae
    n 1: Old World chameleons; in some classifications they are
         considered a superfamily of Sauria [syn: Chamaeleontidae,
         family Chamaeleontidae, Chamaeleonidae, family
         Chamaeleonidae, Rhiptoglossa, family Rhiptoglossa]