Căt'a-plăsm, n.

n. [Lat. cataplasma, Gr. κατάπλασμα, from καταπλάσσειν, to spread over, from κατά, down, quite, and πλάσσειν, to form, mold.] (Med.) A soft and moist substance to be applied to some part of the body, to excite or repel heat, or to relax the skin, &c.; a poultice. Dunglison.