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  • Pumper Outlet Nozzle

    Fire hydrant outlet that is 4 inches in diameter of larger

  • Pumper/Tanker

    A mobile water supply apparatus equipped with a fire pump. In some jurisdictions, this term is used to differentiate a fire pump equipped mobile water supply apparatus whose main purpose is to attack the fire.

  • Pumping Apparatus

    Fire department apparatus that has the primary responsibility to pump water.

  • pupil

    The small opening in the center of the iris.

  • Purkinje network

    A system of fibers in the ventricles that conducts the excitation impulse from the bundle branches to the myocardium.

  • PVC

    An abbreviation for premature ventricular contraction.

  • PVR

    An abbreviation for peripheral vascular resistance.

  • Pyrolysis

    Thermal or chemical decomposition of a substance through the action of heat

  • Pyrolysis

    Process of converting a solid substance to combustible fumes by raising its temperature. See also vaporization of liquids.

  • Pyrolysis

    Thermal or chemical decomposition of a substance through the action of heat