CRYSTAL n.
Anything resembling crystal, as clear water, etc. The blue crystal of the seas. Byron. Blood crystal. See under Blood. -- Compound crystal. See under Compound. -- Iceland crystal, a transparent variety of calcite, or crystallized calcium carbonate, brought from Iceland, and used in certain optical instruments, as the…
CUPPING n.
The operation of drawing blood to or from the surface of the person by forming a partial vacuum over the spot. Also, sometimes, a similar operation for drawing pus from an abscess. Cupping glass, a glass cup in which a partial vacuum is produced by heat, in the process of cupping. -- Dry cupping, the application of a…