prophylactic

/pɹɒfəˈlæktɪk/

noun

  1. 1

    A medicine which preserves or defends against disease; a preventive.

  2. 2

    Any device or mechanism intended to prevent harmful consequences.

    “The securities laws are a prophylactic against stock fraud.”

adjective

  1. 1

    Serving to prevent or protect against an undesired effect, especially disease.

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