'Pustule' definitions:

Definition of 'pustule'

From: WordNet
noun
A small inflamed elevation of skin containing pus; a blister filled with pus

Definition of 'Pustule'

From: GCIDE
  • Pustule \Pus"tule\ (?; 135), n. [L. pustula, and pusula: cf. F. pustule.] (Med.) A vesicle or an elevation of the cuticle with an inflamed base, containing pus. [1913 Webster]
  • Malignant pustule. See under Malignant. [1913 Webster]