1) Archosaur 2) Archosaurian 3) Archosaurian reptile 1) Ichthyosaurus 2) Stenopterygius 
Ichthyosaurs (Greek for `fish lizard` - ιχθυς or ichthys meaning `fish` and σαυρος or sauros meaning `lizard`) were large marine reptiles. Ichthyosaurs belong to the order known as Ichthyosauria or Ichthyopterygia (`fish flippers` - a designation introduced by Sir Richard Owen in 1840, although the term is now used more for the ...[Half-Life] M107 155mm Projectile From http://nfo.dodmedia.osd.mil/ ...
A class of fossil reptiles which lived during the mesozoic era
• (n.) One of the Ichthyosaura.
any member of an extinct group of aquatic reptiles, most of which were very similar to porpoises in appearance and habits. These distant relatives of ... [2 related articles]
(pronounced IK-thee-oh-SAWR) Ichthyosaurs were prehistoric reptiles that lived in the sea. 
Ich'thy·o·saur noun [ Confer French ichthyosaure .] (Paleon.) One of the Ichthyosaura. 
[n] - any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
Ichthyosaur An extinct fishlike marine reptile of the order Ichthyosauria of the Triassic to the Cretaceous periods.
a Mesozoic marine reptile which bears a superficial resemblance to a modern dolphin
noun any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
any fishlike marine reptile of the extinct order Ichthyosauria, ranging from 4 to 40 ft. (1.2 to 12 m) in length and having a round, tapering body, a large head, four paddlelike flippers, and a vertical caudal fin.