1. [ noun ] (medicine) a local infection induced in humans by innoculation with the virus causing cowpox in order to confer resistance to smallpox; normally lasts three weeks and leaves a pitted scar
Synonyms: variola_vaccina variola_vaccine variola_vaccinia vaccina
Related terms: infection progressive_vaccinia
2. [ noun ] (medicine) a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox
Synonyms: cowpox
Related terms: animal_disease pox
Similar spelling:   vaccina