from the GNU version of the Collaborative International Dictionary of English
- n.pl. An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; -- called also Sauropterygia.
from The Century Dictionary and Cyclopedia
- An order of extinct marine Reptilia, having the limbs fitted for swimming, the body fish-like, the neck long, and the head quite small.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of the plesiosaurs
Sorry, no etymologies found.