belemnite

英 [be'ləmnaɪt] 美 [be'ləmnaɪt]

• n. 箭石

详尽释义

n. 名词

1. 【古生物】箭石（乌贼的化石）

英英释义

Noun:

1. a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae

例句

用作名词 (n.)

1. Any of various mineral concretions, such as a belemnite, formerly supposed to be thunderbolts.
   很多矿物结核如箭石过去被认为是雷石。