add. ·- the mass of archoplasm left by the aster in the resting cell.
2. attraction sphere ·add. ·- the central mass of the aster in mitotic cell division; centrosphere.
3. attraction sphere ·add. ·- 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.