'Cowpox' definitions:

Definition of 'cowpox'

From: WordNet
noun
A viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox [syn: cowpox, vaccinia]

Definition of 'Cowpox'

From: GCIDE
  • Cowpox \Cow"pox`\ (-p[o^]ks`), n. (Med.) A pustular eruptive disease of the cow, which, when communicated to the human system, as by vaccination, protects from the smallpox; vaccinia; -- called also kinepox, cowpock, and kinepock. --Dunglison. [1913 Webster]