A tail spike is a sharp bony point at the end of a tail. Swing the tail spike.
Stegosaurus had four of them, and fossils show they were used, since predators carry the wounds. A tail spike arrangement is nicknamed the thagomizer, from a cartoon joke that stuck.
1nountail spikeA sharp bony point at the end of a tail.
“One tail spike was found broken and healed.”
tail spike is a part.
Practised in Dinosaurs & Prehistory