Definitions for cadmia

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Webster Dictionary

  1. Cadmia(noun)

    an oxide of zinc which collects on the sides of furnaces where zinc is sublimed. Formerly applied to the mineral calamine

Freebase

  1. Cadmia

    In alchemy, cadmia, is an oxide of zinc which collects on the sides of furnaces where copper or brass was smelted, and zinc sublimed. The term is also applied to an ore of cobalt. For the cadmia produced in furnaces, there were five identified kinds: the first called botrytis, as being in the form of a bunch of grapes; the second, ostracitis, as resembling a sea shell; the third, placitis, for resembling a crust; the fourth, capnitis; and the fifth, calamitis, which hung around certain iron rods that were used to stir material in the furnace; being shaken off, the cadmia resembled the figure of a quill, called in the Latin, calamus. The cadmia botrytis was found in the middle of the furnace; the ostrytis at the bottom; the placitis at the top; and the capnitis at the mouth of the furnace. In pre-modern medicine, cadmia was used as a desiccative and detersive, in moist stinking ulcers, causing the area to become healed by the formation of scar tissue. The botrytis and placitis were also used for diseases of the eyes. The term cadmia was formerly applied to the mineral calamine, or lapis calaminaris.

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