Pronunciation: (mi-mō'su, -zu),[key] —n. 1. 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.
2. any of various similar or related plants, esp. of the genus Acacia, as the silver wattle, or Albizzia, as the silk tree.
3. a cocktail of orange juice and champagne, usually in equal parts.