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单词 animal pole
释义 animal pole
noun
: the point on the surface of an egg marking the center of the most active part of the protoplasm or the part containing least yolk, being in most animals whose embryology has been studied the point where the polar bodies are segmented off and where the protoplasm about it forms the ectoderm — opposed to vegetal pole; see blastula illustration
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更新时间:2024/12/24 3:40:10