Lime

From Appropedia

The word lime may refer to:

• Powdered chalk or limestone, consisting primarily of calcium carbonate, and often with calcium oxide, magnesium carbonate, ormagnesium oxide, used in as a soil additive in agriculture to increase the pH (reduce the acidity) of soil.

• Calcium oxide ("burnt lime" or "quicklime")

• Various trees of the genus Citrus (especially Citrus latifolia) or their sour green or yellow fruits. See Lime (fruit).