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单词 polar nucleus
释义

Definition of polar nucleus in English:

polar nucleus

noun
Botany
  • (In angiosperm reproduction) either of the two haploid nuclei which move from the poles of the embryo sac to the centre and fuse with the male gamete to form the triploid primary endosperm nucleus.

Origin

Late 19th century; earliest use found in Sydney Vines (1849–1934), botanist.

Definition of polar nucleus in US English:

polar nucleus

noun
Botany
  • (In angiosperm reproduction) either of the two haploid nuclei which move from the poles of the embryo sac to the centre and fuse with the male gamete to form the triploid primary endosperm nucleus.

Origin

Late 19th century; earliest use found in Sydney Vines (1849–1934), botanist.

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更新时间:2025/7/23 19:31:38