ichthyosaurus Meaning, Definition & Usage

  1. noun ichthyosaurs of the Jurassic

WordNet

Ich`thy*o*sau"rus noun
Etymology
NL., fr. Gr. 'ichqy`s, -y`os, a fish + say^ros a lizard.
Wordforms
plural Ichthyosauri
Definitions
  1. (Paleon.) An extinct genus of marine reptiles; -- so named from their short, biconcave vertebræ, resembling those of fishes. Several species, varying in length from ten to thirty feet, are known from the Liassic, Oölitic, and Cretaceous formations.

Webster 1913