| 释义 |
polar nucleus
polar nucleusn. Either of two nuclei in the embryo sac of a flowering plant that fuse with each other and with a male gamete to form the primary endosperm nucleus.po′lar nu′cleus
n. either of two female haploid nuclei, in the embryo sac of flowers, that fuse to produce a diploid nucleus. [1880–85] polar nucleus
polar nucleus[′pō·lər ′nü·klē·əs] (botany) One of the two nuclei in the center of the embryo sac of a seed plant which fuse to form the endosperm nucleus. |