Blister

1. n. A vesicatory; a plaster of Spanish flies, or other matter, applied to raise a blister.
2. n. 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.
3. n. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.