PI

• (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

• (noun) the 16th letter of the Greek alphabet

• (noun) the scientist in charge of an experiment or research project

  synonyms : principal investigator

• (noun) someone who can be employed as a detective to collect information

  synonyms : operative , private detective , private eye , private investigator , shamus , sherlock

• (noun) the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...

WordNet® 3.0, © 2006 by Princeton University.

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