Lime

1. A spiny evergreen shrub or tree (Citrus aurantifolia), native to Asia and having leathery leaves, fragrant white flowers, and edible fruit. Orchards of lemons and limes cannot stand freezing temperatures.
2. The egg-shaped fruit of this plant, having a green rind and acid juice used as flavoring. He put a slice of lime in her drink.
3. A white caustic alkaline substance consisting of calcium oxide, obtained by heating limestone.