Definition of Anthracosaurus in US English:

Anthracosaurus

noun

  • An extinct reptile-like labyrinthodont amphibian of the genus Anthracosaurus, found in late Carboniferous deposits in the British Isles.

Origin

Mid 19th century; earliest use found in Quarterly Journal of the Geological Society of London. From scientific Latin Anthracosaurus, genus name from anthraco- + -saurus, with allusion to the finding of the remains in coal measures, the animal having been supposed to be a reptile.