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mid-15c., "red or crystalline form of mercuric sulphide," also applied to other ores of mercury, originally with reference to its use as a pigment; from Old French cinabre (13c.), from Late Latin cinnabaris, from Greek kinnabari, of oriental origin (cf. Persian zanjifrah in the same sense). Also used 14c.-17c. of red resinous juice of a certain Eastern tree, which was believed to be a mixture of dragon's and elephant's blood.