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Any of several asters that have leafy stems and flower in the fall, especially the New York aster.
(Plants) Brit any of various plants of the genus Aster that have small autumn-blooming purple, pink, or white flowers: family Asteraceae (composites)
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|Noun||1.||Michaelmas daisy - North American perennial herb having small autumn-blooming purple or pink or white flowers; widely naturalized in Europe|
aster - any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers