PI, n.
more info an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs

PI protease inhibitor
more info the scientist in charge of an experiment or research project

PI principal investigator
semantic pointers
more info someone who can be employed as a detective to collect information
<noun.person>   freq. cnt.: 23 freq. cnt.: 12 freq. cnt.: 11

PI operative private detective private eye private investigator shamus sherlock