nucellus

英 [nuː'seləs] 美 [nuː'seləs]

• n. [植]珠心

英英释义

Noun:

1. central part of a plant ovule; contains the embryo sac

例句

用作名词 (n.)

1. 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。
2. 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。