n.
Pronunciation: ' ter- ə - ˌ so ̇ r
Function: noun
Etymology: New Latin Pterosauria, from Greek pteron wing + sauros lizard
Date: 1862
: any of an order (Pterosauria) of extinct flying reptiles existing from the Late Triassic throughout the Jurassic and most of the Cretaceous and having a featherless wing membrane extending from the side of the body along the arm to the end of the greatly elongated fourth digit