Aster /(ăs"tẽr)/

As·ter

Aster

n.
  1. A genus of herbs with compound white or bluish flowers; starwort; Michaelmas daisy. (Bot.)
  2. A plant of the genus Callistephus. Many varieties (called China asters, German asters, etc.) are cultivated for their handsome compound flowers. (Floriculture)
  3. A star-shaped figure of achromatic substance found chiefly in cells dividing by mitosis. (Biol.)