noun (n)

• a highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars(noun.state)

  Synonym:
  variola, variola major
  

  source: wordnet30
• A contagious, constitutional, febrile disease characterized by a peculiar eruption; variola. The cutaneous eruption is at first a collection of papules which become vesicles (first flat, subsequently umbilicated) and then pustules, and finally thick crusts which slough after a certain time, often leaving a pit, or scar.(noun)

  source: webster1913