| 单词 | ammonoid |
| 释义 | ammonoid /am"euh noyd'/, n. any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell. [1880-85; < NL Ammonoidea, equiv. to Ammon(ites) name of the order + -oidea -OIDEA; see AMMONITE2] |
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