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vaccine

noun

  1. lymph, or a preparation of this, from a cowpox vesicle, containing the causative virus and used in vaccination against cowpox or smallpox
  2. any preparation of killed microorganisms, living weakened organisms, etc. introduced into the body to produce immunity to a specific disease by causing the formation of antibodies

adjective

Rare of cowpox or vaccination

See vaccine in American Heritage Dictionary 4

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