Definitions of PI
  1. noun
    someone who can be employed as a detective to collect information
    synonyms: operative, private detective, private eye, private investigator, shamus, sherlock
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    hotel detective, house detective, house dick
    a private detective employed by a hotel or retail store
    inquiry agent
    a private detective
    store detective
    a private detective employed by a merchant to stop pilferage
    type of:
    an investigator engaged or employed in obtaining information not easily available to the public
  2. noun
    the scientist in charge of an experiment or research project
    synonyms: principal investigator
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    type of:
    a person with advanced knowledge of one or more sciences
  3. noun
    an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs
    synonyms: protease inhibitor
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    Crixivan, indinavir
    a protease inhibitor (trade name Crixivan) used for treating HIV
    Viracept, nelfinavir
    a protease inhibitor (trade name Viracept) used in treating HIV usually in combination with other drugs
    Norvir, ritonavir
    a protease inhibitor (trade name Norvir) used in treating HIV
    Invirase, saquinavir
    a weak protease inhibitor (trade name Invirase) used in treating HIV
    type of:
    antiviral, antiviral agent, antiviral drug
    any drug that destroys viruses
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