quicklime <p>Lime prepared by calcining limestone in a kiln at about 500 C to form a white amorphous powder that may contain small amounts of silica, iron, magnesium, and/or aluminum oxides. Oyster shells have been used to make a very pure quicklime. Once water is added, quicklime becomes slaked lime.</p> <p>Source: AAT</p> <p><a href="http://vocab.getty.edu/page/aat/300011740" target="_blank" rel="noopener">http://vocab.getty.edu/page/aat/300011740</a></p>