这个词是什么意思？
MONOZYGOTIC TWINS who are joined in utero. They may be well developed and share only a superficial connection, often in the frontal, transverse or sagittal body plane, or they may share a partial duplication of a body structure. Alternatively, there may be a small and incompletely developed twin conjoined to a larger, more fully developed twin.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D014428 · MeSH 2026。
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