ˈbeləmˌnīt, bə̇ˈlem- noun
( -s )
Etymology: French bélemnite, from Greek belemnon dart + French -ite; akin to Greek belos arrow, ballein to throw — more at devil
: a conical calcareous Mesozoic fossil tapering to a point at the lower extremity, having a conical cavity at the other end that is usually broken but when perfect contains a small chambered phragmocone prolonged on one side into a delicate concave blade, and being the internal shell of any of numerous extinct cephalopods (family Belemnitidae) related to the surviving spirulas — compare thunderstone
• bel·em·nit·ic |beləm|nid.ik, -ˌlem- adjective