Source : Webster's Revised Unabridged Dictionary (1913)

Vesicatory \Ves"i*ca*to*ry\ (?; 277), a. [Cf. F.
   v['e]sicatoire.] (Med.)
   Tending, or having power, to raise a blister. -- n. A
   blistering application or plaster; a vesicant; an epispastic.

Source : WordNet®

vesicatory
     adj : causing blisters [syn: {vesicant}]
     n : a chemical agent that causes blistering [syn: {vesicant}]