calamine

/kal-uh-mahyn, -min/US // ˈkæl əˌmaɪn, -mɪn //UK // (ˈkæləˌmaɪn) //

小儿麻痹症,卡胺,炉甘石,卡胺酮

Definitions

n.名词 noun

1
- : a pink, water-insoluble powder consisting of zinc oxide and about 0.5 percent ferric oxide, used in ointments, lotions, or the like, for the treatment of inflammatory conditions of the skin.
- : Mineralogy. hemimorphite.
- : Chiefly British. smithsonite.

Smithsonite is a carbonate much resembling, and often found with, calamine.
Zinc occurs in nature most commonly as sulphide (blende); it also occurs as carbonate (calamine) and silicate (smithsonite).
In this condition it presents more surface to the action of zinc or calamine, and combines with it more readily.
It is accompanied by zinc ore (calamine), especially in the upper parts of the mountain.
The calamine-and-zinc oxide lotion used in acute eczema is also often extremely valuable.