ammonoid / ˈæm əˌnɔɪd /

📖毕业后词汇瓣膜类动物弹药状物弹药状体弹药体

ammonoid 的定义

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.