ammonite

IPA(Pronunciation)

(paleontology) Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal.

Japanese Meaning

絶滅したアンモノイデ亜綱に属する頭足類の一群、およびその動物の化石としての殻

The geology professor passed around a polished ammonite during the lecture on Mesozoic marine life.

地質学の教授は中生代の海洋生物に関する講義で、磨かれたアンモナイトの化石を回して見せた。

Sense（1）

(paleontology) Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal.

ammonites

（ plural ）