QUICK'LIME, noun [See Lime.] Any calcarious substance deprived of its fixed or carbonic air, or an earthy substance calcined; as chalk, limestone, oyster-shells, etc.; unslaked lime. Calcarious stones and shells are reduced to quicklime by being subjected for a considerable time to intense heat, which expels the carbonic and aqeuous matter.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI