the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...

someone who can be employed as a detective to collect information

[ Syn: private detective , pi , private eye , private investigator , operative , shamus , sherlock ]

the scientist in charge of an experiment or research project

[ Syn: principal investigator , pi ]

the 16th letter of the Greek alphabet

an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs

[ Syn: protease inhibitor , pi ]