資料來源 : Webster's Revised Unabridged Dictionary (1913)

Attraction sphere \At*trac"tion sphere\
   1. (Zo["o]l.)
      (a) The central mass of the aster in mitotic cell
          division; centrosphere.
      (b) 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.