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polar nucleus
释义
WordReference Random House Unabridged Dictionary of American English © 2024
po
′
lar nu
′
cleus,
[
Bot.
]
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.
1880–85
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wear off
wear out
wear-out
wearout
wearproof
weary
wearyingly
weasand
weasel
weaselly
weasel out
weasel word
weasel-worded
weasel words
weather
weatherability
weather advisory
weather balloon
weather-beaten
weatherboard
weatherboarding
weather-bound
weather bureau
weathercast
weathercaster
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更新时间:2026/8/7 3:22:50