| Noun | 1.vesicatory - a chemical agent that causes blistering (especially mustard gas)vesicantchemical agent - an agent that produces chemical reactionsblistering agent, dichloroethyl sulfide, mustard agent, mustard gas, sulfur mustard - a toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs; there is no known antidote | Adj. | 1.vesicatory - causing blistersvesicantnoxious - injurious to physical or mental health; "noxious chemical wastes"; "noxious ideas" |