这个词是什么意思？
Tough, horny, brittle, smooth, striated or plate-like extensions of the stratum corneum or outer layer of the skin. It serves as a protective layer in fishes, reptiles, birds, and mammals.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000075342 · MeSH 2026。
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