from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Inoculation with a vaccine in order to protect against a particular disease.
  • n. A scar left on the skin by vaccinating.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Inoculation with a vaccine in order to protect a particular disease or strain of disease

from the GNU version of the Collaborative International Dictionary of English

  • n. The act, art, or practice of vaccinating, or inoculating with the cowpox, in order to prevent or mitigate an attack of smallpox. Cf. inoculation.
  • n. Any inoculation intended to raise immunity to a disease.

from The Century Dictionary and Cyclopedia

  • n. In medicine, inoculation with vaccine, or the virus of cowpox, as a preventive of smallpox; in an extended sense, inoculation with the virus of any specific disease.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the scar left following inoculation with a vaccine
  • n. taking a vaccine as a precaution against contracting a disease


From Latin vacca ("cow"). The term was coined by Edward Jenner (1749-1823) who infected people with weakened cowpox viruses to immunise them against the disease. (Wiktionary)



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