central part of a plant ovule; contains the embryo sac
nucellus详细解释
nu.cel.lus n.(名词)【复数】nu.cel.li[-sμl.o] 【植物学】 The central portion of an ovule in which the embryo sac develops; the megasporangium.珠心:胚珠的中心,胚芽囊在此发育;大孢子囊 来源:New Latin 现代拉丁语 from nux nuc- [nut] 源自 nux nuc- [坚果] 【引伸】 nucel.lar adj.(形容词)