polar nucleus

noun

Botany. either of two female haploid nuclei, in the embryo sac of flowers, that fuse to produce a diploid nucleus, which combines with a male nucleus to form the endosperm.

Origin of polar nucleus

First recorded in 1880–85

Words nearby polar nucleus

polar distance, polar equation, polar front, polar lights, polar molecule, polar nucleus, polar opposition, polar orbit, polar outbreak, polar regions, polar sequence