An alternative or archaic term for fluorine, the chemical element.
From Latin 'fluorspar' (fluorspar, the mineral) + -in (chemical element suffix). This is an older nomenclature; 'fluorine' became the standard name in modern chemistry.
The name fluorine comes from 'fluorspar,' a mineral that was used as a flux—its name meant 'to flow' in Latin because it helped metal flow better when melting ores in furnaces.
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