n. A poultice or plaster, spread over one's skin as medical treatment.
the GNU version of the Collaborative International Dictionary of English
n. A soft and moist substance applied externally to some part of the body; a poultice.
The Century Dictionary and Cyclopedia
n. In medicine, a soft and moist substance to be applied to some part of the body; a poultice.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.
Word Usage
"The clay cataplasm (that the vet authorized!) is working, along with the antibiotics."