单词：nucellus
音标：[nju:'selәs] ；
n. 珠心
[医] 珠心
[医] 珠心
n. central part of a plant ovule; contains the embryo sac
词型变化：名词复数形式 : nucelluss
nucellus的用法和样例：
例句
用作名词(n.)
- The nucellus is usually degraded and absorbed as the endosperm develops.珠心通常在胚乳发育时被分解和吸收。
- The region of an ovule that is opposite the micropyle,where the integuments and nucellus are joined.合点珠孔对面的胚珠内结合珠被和珠心的一个区域。