stegosaurus

From the genus name Stegosaurus.

stegosaurus (plural stegosauruses or stegosauri)

1. A stegosaur, a member of the suborder Stegosauria, of the order Ornithischia of the middle Jurassic to early Cretaceous period.
   • 1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC:

     "You will observe that both the pterodactyl and the stegosaurus are Jurassic, and therefore of a great age in the order of life."

   • 1988 April 8, Jerry Sullivan, “Field & Street”, in Chicago Reader‎:

     So you tell your friends about it, including the people who have no interest in birding and wouldn't know a Le Conte's sparrow from a stegosaurus.

2. A member of the genus Stegosaurus within this suborder.