Teleosaur :: Teleosaur (n.) Any one of several species of fossil suarians belonging to Teleosaurus and allied genera. These reptiles are related to the crocodiles, but have biconcave vertebrae..
Teleosaurus :: Teleosaurus (n.) A genus of extinct crocodilian reptiles of the Jurassic period, having a long and slender snout..
Teleost :: Teleost (n.) One of the Teleosti. Also used adjectively.
Teleostean :: Teleostean (a.) Of or pertaining to the teleosts.