n.
Pronunciation: ' p ə s-( ˌ )chül, -( ˌ )tyül, -( ˌ )tül
Function: noun
Etymology: Middle English, from Latin pustula; akin to Lithuanian pusti to blow, Greek physa breath
Date: 14th century
1 : a small circumscribed elevation of the skin containing pus and having an inflamed base
2 : a small often distinctively colored elevation or spot resembling a blister or pimple