(chemical) or quicklime CaO (technical name calcium oxide) 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 (CaOH), known as slaked lime, which is used to reduce soil acidity.

Of, relating to, or containing lime or limestone

(tree) or linden; Deciduous tree, genus Tilia, of the family Tiliaceae native to the northern hemisphere. The leaves are heart-shaped and coarsely toothed, and the flowers are cream-colored and fragrant.
The small-leaved lime Tilia cardata is found in areas of ancient woodland in SE England.
Small thorny bush Citrus aurantifolia of the rue family Rutaceae, native to India. The white flowers are succeeded by light green or yellow fruits, limes, which resemble lemons but are more globular in shape.1. Any of various related trees bearing limes; SYN. lime tree, Citrus aurantifolia.
The green acidic fruit of any of various lime trees.

To cover with lime, as of lawns, to induce growth.