What is "attraction sphere"

Attraction sphere \At*trac"tion sphere\

1. (Zo["o]l.)

   1. The central mass of the aster in mitotic cell division; centrosphere.

   2. Less often, the mass of archoplasm left by the aster in the resting cell.

2. (Bot.) A small body situated on or near the nucleus in the cells of some of the lower plants, consisting of two centrospheres containing centrosomes. It exercises an important function in mitosis.