The Collaborative International Dictionary of English v.0.48:

PCP \PCP\ n.
   A drug originally taken in the form of powder ("dust") for
   its hallucinogenic effects.

   Syn: phencyclidine hydrochloride, angel dust.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

PCP
    n 1: a person who helps in identifying or preventing or treating
         illness or disability [syn: health professional, primary
         care provider, PCP, health care provider, caregiver]
    2: a drug used as an anesthetic by veterinarians; illicitly
       taken (originally in the form of powder or `dust') for its
       effects as a hallucinogen [syn: phencyclidine,
       phencyclidine hydrochloride, PCP, angel dust]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PCP
       Primary Control Program (IBM, OS, OS/PCP)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PCP
       Printer Control Protocol