n. Any material that causes blisters upon contact with the skin.
the GNU version of the Collaborative International Dictionary of English
n. A vesicatory.
The Century Dictionary and Cyclopedia
Producing a bleb or blister; blistering; epispastic; vesicatory.
n. A vesicating agent; an epispastic or vesicatory, as cantharides; a blister.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a chemical agent that causes blistering (especially mustard gas)
adj. causing blisters
Word Usage
"Injected intravenously into rabbits and mice, the mustards made the normal white cells of the blood and bone marrow almost disappear, without producing all the nasty vesicant actions, dissociating the two pharmacological effects."