这个词是什么意思？
A class in the phylum MOLLUSCA comprised of flattened, elongated marine mollusks, commonly called chitons. They are unique in that they possess seven or eight separate shell plates.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D049916 · MeSH 2026。
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