1. Botany. a bud: »
Each gemma is a minute, thickened, flat, almost circular outgrowth from the bottom of the cup (Fred W. Emerson).
2. a budlike reproductive body in some plants, such as liverworts and mosses, that becomes detached from the plant and can develop into a new individual.
╂[< Latin gemma bud]
Useful english dictionary. 2012.