- a tropical American plant, Mimosa pudica, cultivated in greenhouses, having bipinnate leaves whose leaflets fold together when touched.
- any of various other plants that are sensitive to touch.
- a tropical American mimosa plant, Mimosa pudica, the leaflets and stems of which fold if touched
- any similar plant, such as the leguminous plant Cassia nictitans of E North America
- a person who is easily upset
