这个词是什么意思？
A biomineral consisting of layers of crystalized ARAGONITE, separated by interlamellar layers of organic matrix containing beta-CHITIN, and surrounded by an intercrystalline organic membrane of silk fibroin. Nacre is the iridescent substance better known as mother-of-pearl that is secreted by MOLLUSCS.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D060734 · MeSH 2026。
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