复数： nucelli

The nucellus is usually degraded and absorbed as the endosperm develops .

珠心通常在胚乳发育时被分解和吸收。

The cells of the integument and nucellus of some plants form perfectly normal embryos .

某些植物的珠被和珠心细胞形成完全正常的胚。

The region of an ovule that is opposite the micropyle , where the integuments and nucellus are joined .

合点珠孔对面的胚珠内结合珠被和珠心的一个区域。

In the second year , the resting pollen tube revives its activity in the nucellus towards the march . The two unequal male gamete formed in the april .

第二年三月，休眠的花粉管在珠心内恢复活动，四月形成二个不等的雄配子。

A minute structure in seed plants , containing the embryo sac and surrounded by the nucellus , that develops into a seed after fertilization .

种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子。