Main Entry: pus·tule

Pronunciation: \ˈpəs-(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