One of the mysteries of the English language finally explained.
A mineral of the monoclinic system that is a hydrated arsenate of calcium and magnesium, (Ca,Mg)₃(AsO₄)₂·6H₂O, occurring as colourless to white needles, incrustations, and concretions.
Early 19th century. After German Picro-pharmacolith; compare pharmacolite.
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