Vaccinia - Definition
vaccinia
n 1: a local infection induced in humans by inoculation with the
virus causing cowpox in order to confer resistance to
smallpox; normally lasts three weeks and leaves a pitted
scar [syn: vaccinia, vaccina, variola vaccine,
variola vaccinia, variola vaccina]
2: a viral disease of cattle causing a mild skin disease
affecting the udder; formerly used to inoculate humans
against smallpox [syn: cowpox, vaccinia]