glyptodon (n.)

extinct gigantic armadillo-like mammal from the Pleistocene of South America, 1838, irregularly formed from Greek glyptos "carved, engraved" (verbal adjective of glyphein "to engrave, carve;" from PIE root *gleubh- "to tear apart, cleave") + odon (genitive odontos) "tooth" (from PIE root *dent- "tooth"). So named for its fluted teeth.