noun
: the triploid nucleus formed in the embryo sac of a seed plant by fusion of a sperm nucleus with the two polar nuclei or with a nucleus produced by their prior fusion — compare double fertilization
noun
: the triploid nucleus formed in the embryo sac of a seed plant by fusion of a sperm nucleus with the two polar nuclei or with a nucleus produced by their prior fusion — compare double fertilization
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012