noun
: the nucleus formed by the fusion of two polar nuclei in the embryo sac of a seed plant prior to fertilization — called also secondary nucleus ; compare endosperm nucleus
noun
: the nucleus formed by the fusion of two polar nuclei in the embryo sac of a seed plant prior to fertilization — called also secondary nucleus ; compare endosperm nucleus
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012