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The Collaborative International Dictionary

Catapasm

Catapasm \Cat"a*pasm\, n. [Gr. ?, fr. ? to besprinkle; kata` down, wholly + ? to strew, or sprinkle.] (Med.) A compound medicinal powder, used by the ancients to sprinkle on ulcers, to absorb perspiration, etc.
--Dunglison.

Wiktionary

catapasm

n. (context medicine obsolete English) A medicinal powder used by the ancients to sprinkle on ulcers, to absorb perspiration, etc.