[endosperm nucleus] n (ca. 1902): the triploid nucleus formed in the embryo sac of a seed plant by fusion of a sperm nucleus with two polar nuclei or with a nucleus formed by the prior fusion of the polar nuclei
ENDOSPERM NUCLEUS
Meaning of ENDOSPERM NUCLEUS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012