(noun)
someone who can be employed as a detective to collect information
(noun)
an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs
(noun)
the scientist in charge of an experiment or research project
(noun)
the 16th letter of the Greek alphabet
(noun)
the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...