Learn how to say Pliosaur correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word pliosaur:
a plesiosaur with a short neck, large head, and massive toothed jaws.
Family Pliosauridae, infraorder Plesiosauria: several genera, including Pliosaurus
mid 19th century: from modern Latin Pliosaurus (genus name), from Greek pleiōn ‘more’ + sauros ‘lizard’ (because of its greater similarity to a lizard than the ichthyosaur)