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Webster 1913 Edition

Noun.

[Gr. [GREEK], fr. [GREEK] to besprinkle;

κατά

down, wholly + [GREEK] to strew, or sprinkle.]

(Med.)

A compound medicinal powder, used by the ancients to sprinkle on ulcers, to absorb perspiration, etc.

Dunglison.

Noun.

A dry powder for sprinkling the body.

catapasm ‎(plural catapasms)

(medicine, obsolete) A medicinal powder used by the ancients to sprinkle on ulcers, to absorb perspiration, etc.
(Can we find and add a quotation of Dunglison to this entry?)