plesiosaur

As nouns the difference between cephalopod and plesiosaur

is that cephalopod is any mollusc, of the class Cephalopoda, which includes squid, cuttlefish, octopus, nautiloids etc while plesiosaur is any of several extinct marine reptiles, of the order Plesiosauria, from the Jurassic and Cretaceous periods.

As nouns the difference between terms and plesiosaur

is that terms is while plesiosaur is any of several extinct marine reptiles, of the order plesiosauria, from the jurassic and cretaceous periods.

As nouns the difference between plesiosaur and archosaur

is that plesiosaur is any of several extinct marine reptiles, of the order Plesiosauria, from the Jurassic and Cretaceous periods while archosaur is any reptile of the taxon Archosauria; includes the extinct dinosaurs, plesiosaurs, pterosaurs and ichthyosaurs and the modern crocodiles.

As an adjective cretaceous

is of or relating to chalk.

As a noun plesiosaur is

any of several extinct marine reptiles, of the order plesiosauria, from the jurassic and cretaceous periods.

As an adjective jurassic

is (label) of or pertaining to the second period of the mesozoic era, a time still dominated by dinosaurs.

As a proper noun jurassic

is the period from 2013±02 to 145 million years ago, after the triassic and before the cretaceous; the geologic systems of this period.

As a noun plesiosaur is

any of several extinct marine reptiles, of the order plesiosauria, from the jurassic and cretaceous periods.

As a proper noun plesiosauria

is .

As a noun plesiosaur is

any of several extinct marine reptiles, of the order plesiosauria, from the jurassic and cretaceous periods.

As nouns the difference between reptile and plesiosaur

is that reptile is while plesiosaur is any of several extinct marine reptiles, of the order plesiosauria, from the jurassic and cretaceous periods.

As nouns the difference between marine and plesiosaur

is that marine is a member of a marine corps while plesiosaur is any of several extinct marine reptiles, of the order Plesiosauria, from the Jurassic and Cretaceous periods.

As an adjective marine

is of, or pertaining to, the sea (marine biology, marine insurance..

As an adjective extinct

is (dated) extinguished, no longer alight (of fire, candles etc).

As a noun plesiosaur is

any of several extinct marine reptiles, of the order plesiosauria, from the jurassic and cretaceous periods.