1.【植】大孢子
1.the larger of two kinds of spore produced by seed plants and some ferns, which develops into a female gametophyte.
1.In theterosporous species, a distinction is usually made between megaspore mother cells and microspore mother cells.
在异型孢子体种类中，可区分为大孢子母细胞和小孢子母细胞。
2.Of the four products of a megaspore mother cell, three usually abort.
在大孢子母细胞分裂产生的四个孢子中，三个会解体消失。
3.The megaspore mother cell meiosis to form a linear megaspore tetrad.
大孢子母细胞减数分裂产生直线形大孢子四分体。
4.In the gymnosperms the megaspore gives rise to a cell that is termed the embryo sac because of its similarity to the angiosperm structure.
在裸子植物中，大孢子也产生一个细胞，因为它类似于被子植物的胚囊细胞，故也可以称之为胚囊。
5.Genesis of megaspore and development of embryo sac in Carica papaya L .
番木瓜的大孢子发生与胚囊发育。