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  • Dalmatian

    "Firehouse dog."

  • Dangerous Good

    Any product, substance, or organism including by its nature in any of the nine United Nations (UN) classification of hazardous materials; term used to describe hazardous materials in the U.S. and Canada for hazardous materials on board aircraft

  • Dangerous Good

    Any product, substance, or organism including by its nature in any of the nine United Nations (UN) classification of hazardous materials; term used to describe hazardous materials in the U.S. and Canada for hazardous materials on board aircraft

  • Darvon

    A trade name for propoxyphene, a narcotic analgesic.

  • DC

    An abbreviation for direct current.

  • Dead lay

    A load of hose on a pumper, but not connected to a pump outlet. Often used for larger supply lines.

  • Dead Load

    Weight of the structure, structural members, building components, and any other feature permanently attached to the building that is constatnt and immobile

  • Dead Load

    Weight of the structure, structural members, building components, and any other feature permanently attached to the building that is constatnt and immobile

  • Dead Man Zone

    Unburnt areas around edges of brush fire.

  • Dead Out

    When a fire is completely out, with no smoldering or burning areas. (This is different from contained.)

  • dead space

    The portion of the tidal volume that does not reach the alveoli and thus does not participate in gas exchange.

  • Dead-End Corridor

    Corridor in which egress is possible in only one direction

  • Dead-End Corridor

    Corridor in which egress is possible in only one direction

  • Dead-End Hydrant

    Fire hydrant that receives water from only one direction.

  • Dead-End Main

    Water main that is not looped and in which water can flow in only one direction.

  • death, biologic

    Irreversible brain damage, usually occurring after 3 to 10 minutes of cardiac arrest.

  • death, clinical

    The moment the pulse and blood pressure are absent. Clinical death occurs immediately after the onset of cardiac arrest.

  • decerebrate posture

    A posture assumed by patients with severe brain dysfunction, characterized by extension and internal rotation of the arms and extension of the legs.

  • decimal

    A unit of 10; a system based on 10s.

  • Deck gun

    A master stream device mounted to top deck of pumper.

  • Decking

    Planks or panels of plywood or oriented strand board (OSB) that form the substrate of a roof assembly. In vertical ventilation through a roof, the decking must be removed from the ventilation opening to realize the full effect of the Read on! →

  • decompensation

    The failure of an organ system; most often used to indicate the failure of the heart, as the result of disease, to maintain sufficient circulation of blood to meet the demands of the body.

  • Decontamination

    Process of removing a hazardous, foreign substance from a person, clothing, or area

  • Decontamination

    Process of removing a hazardous, foreign substance from a person, clothing, or area

  • decorticate posture

    A posture assumed by patients with severe brain dysfunction, characterized by extension of the legs and flexion of the arms.

  • decubitus ulcer

    A bedsore; an eroded wound acquired by sustained pressure on a single area of skin.

  • Defensive Attack

    A primarily exterior form of attack often used when fighting the fire directly or from within a structure is not feasible due to dangers from direct flame, heat, structural collapse or the presence of hazardous materials. Often structures which are Read on! →

  • defibrillation

    The use of unsynchronized direct current (DC) electric shock to terminate ventricular fibrillation.

  • defibrillator

    A device that delivers direct current (DC) electric shock for the purpose of terminating ventricular fibrillation.

  • Definitions A-Z

  • definitive care

    The D of the ABC-D sequence in advanced life support. Definitive care includes ECG monitoring, diagnosis and treatment of cardiac dysrhythmias, defibrillation, and administration of intravenous fluids and drugs.

  • Deflagration

    An explosion with a propagation front traveling at subsonic speeds, as compared to supersonic detonation.

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