nucellus是什么意思
2024-01-27 08:17:17
nucellus
n. [植]珠心
形容词：nucellar 名词复数：nucelli
英英释义
Noun
- central part of a plant ovule; contains the embryo sac
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。