nucellus [nu:'seləs]

例句:

• The cells of the integument and nucellus of some plants form perfectly normal embryos.
  某些植物的珠被和珠心细胞形成完全正常的胚.
  
• 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.
  
• Food materials may be stored in a special tissue derived from the nucellus, called the perisperm.
  营养物质可以贮藏于由珠心产生的一种特殊组织, 叫外胚乳.