[1] : WordNet (r) 2.0

variola vaccine
     n : 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 syn: vaccinia, vaccina, variola vaccinia, variola
         vaccina
see also:
vaccinia vaccina variola vaccinia variola vaccina 

Vaccine >> V Words
Vaccine, definition of term: Vaccine
vaccine_pag1.html

Variola >> V Words
Variola, definition of term: Variola
variola_pag1.html