Blister

blis′tėr, n. a thin bubble or bladder on the skin, containing watery matter: a pustule: a plaster applied to raise a blister.— v.t. to raise a blister.— ns. Blis′ter-bee′tle , Blis′ter-fly , the cantharis, or Spanish fly, used for blistering; Blis′ter-plas′ter , a plaster made of Spanish flies used to raise a blister; Blis′ter-steel , Blis′tered-steel , steel blistered in the proce of manufacture, used for making tools, .— adj. Blis′tery . [M. E.; most prob. O. Fr. blestre , conn. with Old Norse blástr , blása , to blow; Ger. blase .]