lime
White powdery substance used in making mortar and cement. It is made commercially by heating calcium carbonate (CaCO3), obtained from limestone or chalk, in a lime kiln. Quicklime readily absorbs water to become calcium hydroxide Ca(OH)2, known as slaked lime, which is used to reduce soil acidity.
lime
Sharp-tasting green or greenish-yellow citrus fruit of the small thorny lime bush, native to India. The white flowers are followed by the fruits, which resemble lemons but are more round in shape; they are rich in vitamin C. (Citrus aurantifolia, family Rutaceae.)
lime
Any of a group of deciduous trees native to the northern hemisphere. The leaves are heart-shaped and coarsely toothed, and the flowers are cream-coloured and fragrant. (Genus Tilia, family Tiliaceae.)
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