What is "echinodon"

Echinodon (pronounced eh-KY-no-don) meaning "hedgehog tooth" in reference to the spines on its teeth ( Greek εχινος, echinos = hedgehog + όδους, odous = tooth), occasionally known as Saurechinodon, is a genus of small European dinosaur of the early Cretaceous Period ( Berriasian age), 140 million years ago.