noun

• (chemistry) Abbreviation of phenylcyclohexyl piperidine, an alternative name for phencyclidine.
• (organic chemistry) Abbreviation of pentachlorophenol. [(organic chemistry) A fully chlorinated derivative of phenol that is used as a fungicide and wood preservative]
• (biochemistry) Initialism of peptidyl carrier protein.
• (mathematics) Initialism of probabilistically checkable proof. [(computing theory) A reasonable proof of a computational theorem or conjecture obtained via a randomized algorithm.]
• (healthcare) Initialism of primary care physician.
• (healthcare) Initialism of primary care practitioner.
• (medicine) Abbreviation of pneumocystis pneumonia. [A form of pneumonia caused by the yeast-like fungus Pneumocystis jirovecii.]