
Pliosaurus (meaning `more lizard`) is an extinct genus of thalassophonean pliosaurid known from the Kimmeridgian and Tithonian stages (Late Jurassic) of Europe. Its diet would have included fish, squid and other marine reptiles. This genus has contained many species in the past but recent reviews found only six to be valid, while the validity of.....
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http://en.wikipedia.org/wiki/Pliosaurus

• (n.) An extinct genus of marine reptiles allied to Plesiosaurus, but having a much shorter neck.
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http://thinkexist.com/dictionary/meaning/pliosaurus/
Pli`o·sau'rus noun [ New Latin , from Greek ... greater + ... lizard.]
(Paleon.) An extinct genus of marine reptiles allied to Plesiosaurus, but having a much shorter neck.
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http://www.encyclo.co.uk/webster/P/108

Pliosaurus A more (greater) saurian) from Middle-Late Jurassic and Creataceous Europe. It was not a dinosaur. Named by British anatomist Sir Richard Owen in 1841.
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http://www.wordinfo.info/words/index/info/view_unit/2727/27
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