any of an extinct group (order Sauropterygia) of large water reptiles of the Mesozoic Era, characterized by a small head, long neck, short tail, and four paddlelike limbs
Origin of plesiosaurfrom Modern Latin Plesiosaurus from Classical Greek pl?sios, close, near, akin to pelos, near (prob. from Indo-European base an unverified form pel-, to push from source felt, Classical Latin pellere, to drive) + -saur
Any of various extinct marine reptiles of the group Plesiosauria of the Mesozoic Era, having paddlelike limbs, a short tail, and sometimes a very long neck.
Origin of plesiosaurNew Latin Plēsiosaurus type genus Greek plēsios near to ; see pel-5 in Indo-European roots.Greek sauros lizard
plesio- +"Ž -saur