Ichthyosauria
Pronunciation : Ich`thy*o*sau"ri*a
Part of Speech : n.
Etymology : [NL. See Ichthyosaurus.] (Paleon.)
Definition : Defn: An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period.
pl.
Source : Webster's Unabridged Dictionary, 1913