poultice(redirected from cataplasm)
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a form of heat application to the skin and deeper lying tissues and organs. A poultice is made from coarsely ground vegetable matter that has mucous characteristics; linseed and Iceland moss are often used. The vegetable matter is brought to a boil and cooked until a doughy mass is formed. Dry poultices, made from such substances as heated ash, peat, or linseed, are also used. Paraffin and peat treatments and certain other forms of physiotherapy are more perfected heat procedures.