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Definition of mimosa
1 : any of a genus (Mimosa) of trees, shrubs, and herbs of the legume family that occur in tropical and warm regions and have usually bipinnate often prickly leaves and globular heads of small white or pink flowers
2 : silk tree
3 : a mixed drink consisting of champagne and orange juice
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Time Traveler for mimosa
The first known use of mimosa was circa 1731
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