Definition: Zinc oxide with a small amount of ferric oxide or basic zinc carbonate colored with ferric oxide; used in dusting powders, lotions, and ointments, as a mild astringent and protective agent for skin disorders.
[Mediev. L. calamina, fr. L. cadmia, fr. G. kadmia, Theban (earth), fr. Kadmos, founder of Thebes]
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