̷ ̷ˌ ̷ ̷ ̷ ̷ˈlāshən noun
( -s )
1. : the condition of having or process of forming vesicles : the presence or formation of vesicles
2. : distribution or arrangement of vesicles
a variable vesiculation of the affected skin
vesiculation of the two types of lava differs considerably — G.W.Tyrrell