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Noun: variolation  ,veh-ree-u'ley-shun
  1. The obsolete process of inoculating a susceptible person with material taken from a vesicle of a person who has smallpox
    "Variolation was a precursor to modern vaccination techniques";
    - variolization, variolisation [Brit]

Derived forms: variolations

Type of: inoculating, vaccinating

Encyclopedia: Variolation