Synonyms of pi

1. pi, transcendental number: usage: the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
2. private detective, PI, private eye, private investigator, operative, shamus, sherlock, detective: usage: someone who can be employed as a detective to collect information
3. principal investigator, PI, scientist: usage: the scientist in charge of an experiment or research project
4. pi, letter, letter of the alphabet, alphabetic character: usage: the 16th letter of the Greek alphabet
5. protease inhibitor, PI, antiviral, antiviral agent, antiviral drug: usage: an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs