plural noun
Xeno·sau·ri·dae | \ˌzenəˈsȯrəˌdē\

Definition of Xenosauridae 

: a monotypic family of slender-bodied Mexican lizards that is held to be intermediate between Iguanidae and Anguidae and comprises forms with the upper surface covered with minute granules and tubercles

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History and Etymology for Xenosauridae

New Latin, from Xenosaurus, type genus (from xen- + -saurus) + -idae

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