Aster

·noun A genus of herbs with compound white or bluish flowers; starwort; Michaelmas daisy.

II. Aster ·add. ·noun A star-shaped figure of achromatic substance found chiefly in cells dividing by mitosis.

III. Aster ·noun A plant of the genus Callistephus. Many varieties (called China asters, German asters, ·etc.) are cultivated for their handsome compound flowers.