Source : Webster's Revised Unabridged Dictionary (1913)

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.