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Noun:
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central part of a plant ovule; contains the embryo sac
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用作名詞 (n.)
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The nucellus is usually degraded and absorbed as the endosperm develops.
珠心一般 在胚乳發育成熟時被吸附和獲取。
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The region of an ovule that is opposite the micropyle,where the integuments and nucellus are joined.
合點珠孔旁邊的胚珠內緊密聯系珠被和珠心的這個行政區域。
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海詞英語詞典,二十七年公司