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单词 ammonoid
释义
am·mo·noid (ămə-noid)
n.
An extinct cephalopod mollusk of the subclass Ammonoidea of the Devonian to Cretaceous Periods, having a straight or coiled chambered shell characterized by more or less intricate suture patterns where the septa between individual chambers join the outer shell wall.
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更新时间:2025/3/22 10:27:12