The Collaborative International Dictionary of English v.0.48:

Iguanidae \Iguanidae\ n.
   A natural family of New World lizards including the common
   Iguana, Iguana iguana.

   Syn: family Iguanidae.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Iguanoid \I*gua"noid\, a. [Iguana + -oid.] (Zool.)
   Pertaining to the Iguanid[ae].
   [1913 Webster]

WordNet (r) 3.0 (2006):

Iguanidae
    n 1: New World lizards [syn: Iguanidae, family Iguanidae,
         Iguania, family Iguania]