Blister (&unr_;), n. [OE.; akin to OD. bluyster, fr. the same root as blast, bladder, blow. See Blow to eject wind.] 1. A vesicle of the skin, containing watery matter or serum, whether occasioned by a burn or other injury, or by a vesicatory; a collection of serous fluid causing a bladderlike elevation of the cuticle.
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And painful blisters swelled my tender hands. Grainger.
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2. Any elevation made by the separation of the film or skin, as on plants; or by the swelling of the substance at the surface, as on steel.
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3. A vesicatory; a plaster of Spanish flies, or other matter, applied to raise a blister. Dunglison.
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Blister beetle, a beetle used to raise blisters, esp. the Lytta vesicatoria (or Cantharis vesicatoria), called Cantharis or Spanish fly by druggists. See Cantharis. -- Blister fly, a blister beetle. -- Blister plaster, a plaster designed to raise a blister; -- usually made of Spanish flies. -- Blister steel, crude steel formed from wrought iron by cementation; -- so called because of its blistered surface. Called also blistered steel. -- Blood blister. See under Blood.
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Blister, v. t. 1. To raise a blister or blisters upon.
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My hands were blistered. Franklin.
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2. To give pain to, or to injure, as if by a blister.
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This tyrant, whose sole name blisters our tongue. Shak.
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