SINCE 1828
Diapsida
plural noun
Di·ap·si·da
| \
dīˈapsədə \
Definition of Diapsida
in some classifications
: a subclass of reptiles having two pairs of temporal openings in the skull and including the extinct dinosaurs and pterosaurs, the crocodiles and rhynchocephalians, and usually the lizards and snakes — compare parapsida
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