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

  • n. Prevention of or protective treatment for disease.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Prevention of, or protective treatment for disease.

from the GNU version of the Collaborative International Dictionary of English

  • n. The art of preserving from, or of preventing, disease; the observance of the rules necessary for the preservation of health; preservative or preventive treatment.

from The Century Dictionary and Cyclopedia

  • n. In medicine, the guarding against the attack of some disease. Also prophylactic, prophylaxy.

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

  • n. the prevention of disease


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

New Latin, from Greek prophulaktikos, prophylactic; see prophylactic.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin, from Ancient Greek πρό (pro, "before") + φυλάξις (phylaxis, "a watching, guarding").


  • Another beneficial prophylaxis is to take probiotic acididophilus and other lactic fermentation products daily, either in capsules or as yoghurt or in Yakult ™.

    Treating Food/Water Poisoning in Mexico, or Any Other Place

  • Newborn diagnosis enables healthcare providers to start preventive treatment (penicillin prophylaxis) and family health education before the start of symptoms.

    Diagnosing and treating sickle cell disease

  • In addition, the available treatments for long-term prophylaxis are associated with significant side effects. - Articles related to Canada's secret plans to dominate the Olympics

  • Wiener RH, Malinchoc M, et al. A model to in patients receiving long-term prophylaxis to prevent predict surviral in patients with end-stage liver disease. hepatitis B recurrence.

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  • Use of Tamiflu to prevent infection, a procedure called prophylaxis, has occasionally given rise to resistant viruses.


  • It was explained to us that Tamiflu was only available for her and not the rest of the family as it seems basically everybody in this part of the world would be exposed to this illness over the next few weeks so the idea of prophylaxis to prevent spread no longer made sense.

  • And also, it's important to point out that this was used purely as prophylaxis, meaning in women who had not developed asthma, it reduced the number of new asthma cases.

    CNN Transcript Mar 13, 2008

  • Richet calls this hypersensitivity with regard to toxins, anaphylaxis, in contrast to phylaxis or prophylaxis, meaning protection.

    Nobel Prize in Physiology or Medicine 1913 - Presentation Speech

  • It firmly secures the e5 pawn, grabs more space, and is a kind of "prophylaxis" against Black's main try for counterplay ... g5.

    United States Chess Federation

  • The world needs a fully funded, comprehensive and strategic approach to AIDS prevention and treatment, which includes finding new HIV prevention options, such as AIDS vaccines and antiretroviral-based HIV prevention, including pre-exposure prophylaxis (PrEP) and microbicide gels that could be used by women and men to protect themselves from HIV infection.

    Mitchell Warren: Ending AIDS: Grounds for Despair, Cynicism or Hope?


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  • In chess, this word is used to describe a preventative move.

    February 21, 2007