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embryo sac
释义
WordReference Random House Unabridged Dictionary of American English © 2024
em
′
bryo sac′,
[
Bot.
]
Botany
the megaspore of a seed-bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization.
1870–75
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window shade
window-shop
window shopper
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windowy
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wind-pollinated
wind-pollination
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windproof
wind pump
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windrode
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windscale
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wind-screen
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更新时间:2026/9/7 8:17:24