Source : Webster's Revised Unabridged Dictionary (1913)

Vesication \Ves`i*ca"tion\, n. [Cf. F. v['e]sication.] (Med.)
   The process of vesicating, or of raising blisters.

Source : WordNet®

vesication
     n : the formation of vesicles [syn: {vesiculation}, {blistering}]