| 单词 | germ layer |
| 释义 | germ layer【医】 胚层 germ layer germ layer n.（名词）Any of three cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate and from which the organs and tissues of the body develop through further differentiation.胚层：外胚层、内胚层或中胚层三个细胞层的任一个，多数动物的胚胎先分化成胚层，而后通过进一步分化发育成器官和组织 |
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