ammonoid
英[æ'mɒnɔɪd]
美[æ'mɒnɔɪd]
Noun:
-
one of the coiled chambered fossil shells of extinct mollusks
- 1. After each extinction, a rich variety of ammonoid species and body plans was replaced by a few free-floating types.
- 在每次物种灭绝之中，大量的菊石和体平面为少量浮游动物所替代。
youdao
- 2. After each extinction, a rich variety of ammonoid species and body plans was replaced by a few free-floating types.
- 在每次物种灭绝之中，大量的菊石和体平面为少量浮游动物所替代。
youdao
