Definition of primary endosperm nucleus in English:
primary endosperm nucleus
noun
Botany
The triploid nucleus which results from the fusion of the two polar nuclei of the embryo sac with a sperm nucleus, and which (usually) divides to form the endosperm tissue.
Origin
Late 19th century; earliest use found in The Botanical Gazette.
Definition of primary endosperm nucleus in US English:
primary endosperm nucleus
noun
Botany
The triploid nucleus which results from the fusion of the two polar nuclei of the embryo sac with a sperm nucleus, and which (usually) divides to form the endosperm tissue.
Origin
Late 19th century; earliest use found in The Botanical Gazette.