16c. alteration of Middle English pultes (late 14c.), ultimately from Latin pultes, plural of puls "porridge" (see pulse (n.2)).
poultice poul·tice (pōl'tĭs)
n.
A soft moist adhesive mass, as of meal or clay, that is usually heated, spread on cloth, and applied to warm, moisten, or stimulate an aching or inflamed part of the body. Also called cataplasm.