Definify.com
Webster 1913 Edition
Plesiosauria
‖
Pleˊsi-o-sau′ri-a
,Noun.
pl.
[NL. See
Plesiosaurus
.] (Paleon.)
An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; – called also .
Sauropterygia
Definition 2025
Plesiosauria
Plesiosauria
Translingual
Proper noun
Plesiosauria
- A taxonomic order within the class Reptilia – the plesiosaurs.
Hypernyms
- (order): Tetrapoda - Superclass; Reptiliomorpha, Amniota - clades; Reptilia - class; Eureptilia, Romeriida - clades; Diapsida - subclass; Lepidosauromorpha - infraclass; †Sauropterygia - superorder
Hyponyms
- (infraorder): Plesiosauroidea, Pliosauroidea - suborders; incertae sedis