‖n. pl. [ NL., from Gr. &unr_; marine (&unr_; in + &unr_; the sea) + &unr_; a lizard. ] (Paleon.) An extinct group of marine reptiles, embracing both the Ichthyosauria and the Plesiosauria, now regarded as distinct orders. [ 1913 Webster ]
a. (Paleon.) Pertaining to the Enaliosauria. --