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单词 placoid
释义

placoid

/ˈplækɔɪd/
adjective
Zoology (of fish scales) tooth-like, being made of dentine with a pointed backward projection of enamel, as in sharks and rays
【动】(鱼鳞)板状的。比较CTENOIDGANOID.
词源
mid 19th cent.: from Greek plax, plak- 'flat plate' + -OID.
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更新时间:2025/7/6 14:07:28