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Noun: contagion  kun'tey-jun
  1. Any disease easily transmitted by contact
    - contagious disease
  2. An incident in which an infectious disease is transmitted
    - infection, transmission
  3. The communication of an attitude or emotional state among a number of people
    "a contagion of mirth";
    - infection

Derived forms: contagions

Type of: communicable disease, communication, incident

Encyclopedia: Contagion