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  • K+

    The chemical symbol for potassium ion.

  • K-tool

    A forcible entry tool for removing cylinder locks

  • K-tool

    This tool is used to break the lock on a building. The name "K" came from the shape of its jaws.

  • Kelly tool

    A prying tool much like a Halligan tool without the right-angle pointed tip.

  • keratin

    The horny, proteinlike substance in the upper layers of the skin that is also the principle constituent of the hair and nails.

  • ketoacidosis

    The condition arising in diabetics whose insulin dose is insufficient to meet their needs, wherein blood sugar reaches high levels, and fat is metabolized to ketones and acids. It is characterized by excessive thirst, urination, nausea, and vomiting, sometimes coma. Read on! →

  • kg

    An abbreviation for kilogram.

  • kidneys

    Paired organs located in the retroperitoneum that filter the blood and produce urine.

  • kilogram (kg)

    A unit of measurement in the metric system, equal to 1,000 gm or 2.2 pounds.

  • Kilopascal (kPa)

    Metric unit of measure for pressure; 1 psi = 6.895 kPa, 1 kPa = 0.145 psi.

  • Kink

    Severe bend in a hoseline that increases friction loss and reduces the flow of water through the hose.

  • Knock down

    To reduce the flame or heat on the more vigorously burning parts of a fire edge, usually by cooling with dirt, water or other retardant.

  • Knox Box

    A box secured to the outside (esp. of a commercial occupancy) containing master keys, accessible by a high-security key available to responding firefighters.

  • KO (KVO)

    An abbreviation for keep open (keep vein open). It refers to a very slow rate of intravenous infusion designed simply to keep the route patent and prevent the line from clotting.

  • Kussmaul breathing

    Respiratory pattern characteristic of the diabetic in ketoacidosis, with marked hyperpnea and tachypnea.