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The Collaborative International Dictionary
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.