polar body

polar-body的词性：
n.（名词）

1. A minute cell produced and ultimately discarded in the development of an oocyte, containing little or no cytoplasm but having one of the nuclei derived from the first or second meiotic division.
（细胞）极体：在一个卵母细胞的发展中，产生并最终被废弃的一种微小的细胞，只含很少或不含细胞质，但有从第一或第二次减数分裂得到的细胞核中的一个