as·ter /ˈæstɚ/ 名詞
1. Bot. A genus of herbs with compound white or bluish flowers; starwort; Michaelmas daisy.
2. Floriculture A plant of the genus Callistephus. Many varieties (called China asters, German asters, etc.) are cultivated for their handsome compound flowers.
3. Biol. A star-shaped figure of achromatic substance found chiefly in cells dividing by mitosis.
n 1: any of various chiefly fall-blooming herbs of the genus
Aster with showy daisylike flowers
2: star-shaped structure formed in the cytoplasm of a cell
having fibers like rays that surround the centrosome