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producing a blister or blisters, as a medicinal substance; vesicating.

a vesicant agent or substance.

(in chemical warfare) a chemical agent that causes burns and destruction of tissue both internally and externally.

tending to cause irritation; irritating. irritating.

anything that irritates.

Physiology, Pathology. a biological, chemical, or physical agent that stimulates a characteristic function or elicits a response, especially an inflammatory response.