这个词是什么意思？
An abnormal bone development that is characterized by extra long and slender hands and fingers, such that the clenched thumb extends beyond the ulnar side of the hand. Arachnodactyly can include feet and toes. Arachnodactyly has been associated with several gene mutations and syndromes.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D054119 · MeSH 2026。
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