盤ばん割かつ

noun

discoidal cleavage

Technical term in embryology referring to a type of meroblastic cleavage in which cell division is restricted to a disc-shaped region at the animal pole, typical of large-yolked eggs such as those of birds and fish.

• 鳥ちょう類るいの卵らんでは盤ばん割かつが起おこる。

  Discoidal cleavage occurs in bird eggs.