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See also: t/c/p




  1. (travel, aviation) Initialism of to complete party (followed by total number in group. Code used in OSI to advise an airline that other passengers are travelling with a person but are booked separately)
  2. Initialism of thienyl cyclohexylpiperidine: tenocyclidine, a disassociative anesthetic drug with hallucinogenic properties. (Compare PCP.)
    • 1978, National Institute on Drug Abuse. Division of Research, Phencyclidine (PCP) Abuse: An Appraisal, page 126:
      5 percent of street THC samples are combinations of TCP and PCC.

Proper noun[edit]


  1. (computing, Internet) Initialism of Transmission Control Protocol.
  2. A brand of mild antiseptic, originally formulated with trichlorophenylmethyliodosalicyl.
    • 2013, Miles Cawrinkle, Wildgene, page 136:
      'Is it all right to put some TCP on that ulcer?'