• WordNet 3.6
    • n plesiosaurus extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
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Webster's Revised Unabridged Dictionary
    • n Plesiosaurus (Paleon) A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age.
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Century Dictionary and Cyclopedia
    • n plesiosaurus A genus of Reptilia, typical of the order Plesiosauria, and formerly conterminous with it, now restricted to forms from the Upper Triassic (Rhætic) and the Liassic, as P. dolichodirus, with extremely long neck.
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Chambers's Twentieth Century Dictionary
    • n Plesiosaurus plē-zi-o-saw′rus the type or leading genus of a family (Plesiosauridæ) of fossil sea-reptiles, which are characteristic of the Mesozoic systems.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr near + a lizard
Chambers's Twentieth Century Dictionary
Gr. plēsios, near, sauros, lizard.


In literature:

Where float the mighty ichthyosaurus, the megalosaurus, in company with the gigantic plesiosaurus!
"The Lost City" by Joseph E. Badger, Jr.
There was also that gigantic swan, the Plesiosaurus; in fact, all the early brutes were disgusting.
"Backlog Studies" by Charles Dudley Warner
PLESIOSAURUS, an extinct marine animal with a small head and a long neck.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
And for poultry there was the Plesiosaurus; there were nice pickings on that too.
"Five Children and It" by E. Nesbit
Suddenly the Ichthyosaurus and the Plesiosaurus disappeared beneath the waves, leaving behind them a maelstrom in the midst of the sea.
"A Journey to the Centre of the Earth" by Jules Verne
Plesiosaurus, 106, 133, 178.
"On the Genesis of Species" by St. George Mivart
The question now was, what was to be done with the carcass of the dead plesiosaurus.
"Harry Escombe" by Harry Collingwood
Plesiosaurus, figure of, 277.
"A Manual of Elementary Geology" by Charles Lyell
Still more heteroclitic and unlike existing nature was the pterodactyle, a small lizard, contemporary with the ichthyosaurus and plesiosaurus.
"The Religion of Geology and Its Connected Sciences" by Edward Hitchcock
Another fish-lizard, well and unfavorably known by his neighbors of the sea, was the Plesiosaurus.
"The Adventures of a Grain of Dust" by Hallam Hawksworth
Another animal which lived at this period was the Plesiosaurus.
"Harper's New Monthly Magazine, No. VI, November 1850, Vol. I" by Various

In poetry:

"When beside thee walked the solemn Plesiosaurus,
And around thee crept the festive Ichthyosaurus,
While from time to time above thee flew and circled
Cheerful Pterodactyls.
"To The Pliocene Skull" by Francis Bret Harte