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a cantharidal blister caused by discharge of a vesicating body fluid by certain beetles, particularly members of the family Meloidae that produce cantharidin, for example, Lytta (Cantharis) vesicatoria, the notorious "Spanish fly"; noncantharidin vesicating fluid is produced by other beetles, such as rove beetles (family Staphylinidae), especially the genus Paederus, whose fluid, on contact with the skin, produces an intensely painful blister.
Farlex Partner Medical Dictionary © Farlex 2012
A blister produced by application of cantharides to the skin.
See also: blister
Medical Dictionary, © 2009 Farlex and Partners