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.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "plesiosaurus" in a sentence
"Mary Anning 1799-1847, the great West Country palaeontologist, struggled for years to have her discoveries – such as the plesiosaurus – recognised as her own."
"June, 1972, when Rines first saw “a large, darkish hump, covered ... with rough, mottled skin, like the back of an elephant”: there is no plesiosaurus, nor any other aquatic dinosaur, nor slithering monstrosity of any kind, in the murky depths of Loch Ness."
"And here is a cast of the pterodactyle and bones of the ichthyosaurus and the plesiosaurus, just as fresh as if it had been recently dug up in a churchyard."