- vaccinia, vaccina, variola vaccine, variola vaccinia, variola vaccina - 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
--1 is a kind of infection
--1 has particulars: progressive vaccinia, vaccinia gangrenosa - cowpox, vaccinia - a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox
--2 is a kind of animal disease; pox