ammonoid

/am-uh-noid/US // ˈæm əˌnɔɪd //

瓣膜类动物,弹药状物,弹药状体,弹药体

Definitions

n.名词 noun

1
- : any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell.