| aster | star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis |
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| aster | any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers |
| aster | North American perennial with apparently whorled leaves and showy white purple-tinged flowers |
| aster | common North American perennial with heathlike foliage and small white flower heads |
| aster | perennial wood aster of eastern North America |
| aster | rhizomatous perennial wood aster of eastern North America with white flowers |
| aster | stiff perennial of the eastern United States having small linear leaves and numerous tiny white flower heads |
| aster | common much-branched North American perennial with heathlike foliage and small starry white flowers |
| aster | perennial of western North America having white flowers |
| aster | plants with heads composed of many florets: aster |
| aster | wiry tufted perennial of the eastern United States with stiff erect rough stems, linear leaves and large violet flowers |
| aster | early-flowering perennial of southern and southeastern Europe with flower heads resembling those of goldenrod |