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From The Collaborative International Dictionary of English v.0.48:
Galena \Ga*le"na\, n.[L. galena lead ore, dross that remains after melting lead: cf. F. gal[`e]ne sulphide of lead ore, antidote to poison, stillness of the sea, calm, tranquility.] [1913 Webster] 1. (Med.) A remedy or antidote for poison; theriaca. [Obs.] --Parr. [1913 Webster] 2. (Min.) Lead sulphide; the principal ore of lead. It is of a bluish gray color and metallic luster, and is cubic in crystallization and cleavage. [1913 Webster] False galena. See Blende. Galenic