[mi-moh-suh, -zuh]
any of numerous plants, shrubs, or trees belonging to the genus Mimosa, of the legume family, native to tropical or warm regions, having small flowers in globular heads or cylindrical spikes and often sensitive leaves.
any of various similar or related plants, especially of the genus Acacia, as the silver wattle, or Albizzia, as the silk tree.
a cocktail of orange juice and champagne, usually in equal parts.

1695–1705; < Neo-Latin, equivalent to Latin mīm(us) mime + -ōsa, feminine of -ōsus -ose1

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World English Dictionary
mimosa (mɪˈməʊsə, -zə)
1.  See also sensitive plant any tropical shrub or tree of the leguminous genus Mimosa, having ball-like clusters of yellow or pink flowers and compound leaves that are often sensitive to touch or light
2.  any similar or related tree
[C18: from New Latin, probably from Latin mīmusmime, because the plant's sensitivity to touch imitates the similar reaction of animals]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

genus of leguminous shrubs, 1731, coined in Mod.L. (1619) from L. mimus "mime" + -osa, adj. suffix (fem. of -osus); so called because some species (including the common Sensitive Plant) fold leaves when touched, seeming to mimic animal behavior. The alcoholic drink is so called from its yellowish color,
which resembles that of the mimosa.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
And it was in the winter time, a grey cold day, but he had a great flowering mimosa in the window.
While waiting for your mimosa, check out the photographs on the walls.
The restaurant hosts a mimosa brunch on weekends as well.
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