1.  pcp(n = noun.person) caregiver, health care provider, health professional, primary care provider - a person who helps in identifying or preventing or treating illness or disability;
is a kind of professional, professional person
is a member of health profession
has particulars: bonesetter, electrologist, medical assistant, medical man, medical practitioner, nurse, apothecary, chemist, druggist, pharmacist, pill pusher, pill roller

2.  pcp(n = noun.artifact) angel dust, phencyclidine, phencyclidine hydrochloride - a drug used as an anesthetic by veterinarians; illicitly taken (originally in the form of powder or `dust') for its effects as a hallucinogen;
is a kind of hallucinogen, hallucinogenic drug, psychedelic drug, psychodelic drug

   a drug originally taken in the form of powder ("dust") for its hallucinogenic effects. [WordNet 1.5]

N  intemperance, sensuality, animalism, carnality, tragalism, pleasure, effeminacy, silkiness, luxury, luxuriousness, lap of pleasure, lap of luxury, free living, indulgence, high living, wild living, inabstinence, self- indulgence, voluptuousness, epicurism, epicureanism, sybaritism, drug habit, dissipation, licentiousness, debauchery, crapulence, revels, revelry, debauch, carousal, jollification, drinking bout, wassail, saturnalia, orgies, excess, too much, Circean cup, bhang, hashish, marijuana, pot, hemp, grass, opium, cocaine, morphine, heroin, LSD, lysergic acid diethylamide, phencyclidine, angel dust, PCP, barbiturates, amphetamines, speed, intemperate, inabstinent, sensual, self-indulgent, voluptuous, luxurious, licentious, wild, dissolute, rakish, fast, debauched, brutish, crapulous, swinish, piggish, Paphian, Epicurean, Sybaritical, bred in the lap of luxury, nursed in the lap of luxury, indulged, pampered, full-fed, high-fed, being full of supper and distempering draughts.