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  • a

    a prefix that means not or without.

  • A-side

    Front of the fire building, usually front door facing street, but may be facing parking area where first apparatus arrives; other sides labeled B (left), C (rear), D (right), as necessary when speaking of or staffing structure fire Sectors.

  • abdomen

    area below diaphragm containing stomach, liver, and bowel etc.

  • abdominal

    Pertaining to the abdomen.

  • abduct

    To draw away from.

  • abduction

    Move away from.

  • abnormality

    Being abnormal or malformed.

  • abortion

    The premature expulsion of the embryo or fetus.

  • Above-ground storage tank

    Storage tank that is not buried. Compare Underground storage tank. Unburied tanks are more prone to physical damage, and leaks are released to the air or ground, rather than the soil surrounding a buried tank.

  • abrasion

    Scraping off of some of the epidermis.

  • abruptio placenta

    Premature separation of placenta from uterine wall, with massive hemorrhage, usually during the third trimester. A small degree of abruption without bleeding occurs in most pregnancies.

  • abscess

    A collection of pus, usually in a sac.

  • absolute refractory period

    Phase of cardiac repolarization, wherein the heart muscle cannot be stimulated to depolarize. There are two main periods

  • absorption

    Passage of a substance thru a membrane into blood.

  • ac

    Abbreviation meaning "before meals."

  • Accelerant

    flammable fuel (often liquid) used by some arsonists to increase size or intensity of fire. May also be accidentally introduced when HAZMAT becomes involved in fire.

  • Accelerator

    Device, usually in the form of a foot pedal, used to control the speed of a vehicle by regulating the fuel supply

  • Acceptance Testing (Proof Test)

    Preservice tests on fire apparatus or equipment performed at the factory or after delivery to assure the purchaser that the apparatus or equipment meets bid specifications.

  • Access

    (1) Place or means of entering a structure. (2) roadways allowing fire apparatus to travel to an emergency

  • Access

    (1) Place or means of entering a structure. (2) roadways allowing fire apparatus to travel to an emergency

  • Accessibility

    Ability of fire apparatus or emergency responders to get close enoug to a building, structure, or site to conduct emergency operations

  • Accessibility

    Ability of fire apparatus to get close enough to a building to conduct emergency operations.

  • Accessibility

    Ability of fire apparatus or emergency responders to get close enoug to a building, structure, or site to conduct emergency operations

  • Accident

    Unplanned, uncontrolled event that results from unsafe acts of people and/or unsafe occupational conditions, either of which can result in injury.

  • Accountability

    The process of emergency responders (fire, police, SAR, emergency medical, etc…) checking into and making themselves announced as being on-scene during an incident to an incident commander or accountability officer. Through the accountability system, each person is tracked throughout the Read on! →

  • acetabulum

    Boney pelvic cavity in which head of femur rotates.

  • acetone breath

    Sweet breath odor found in starvation or diabetic ketoacidosis.

  • acetylcholine

    Chemical mediator of the parasympathetic nervous system. abbreviated ACH

  • Acid

    Compound containing hydrogen that reacts with water to produce hydrogen ions; liquid compound with a pH less than 2.

  • acid

    A solution with a pH less than 7.0, a solution with more hydrogen ions than hydroxyl ions.

  • Acid

    Compound containing hydrogen that reacts with water to produce hydrogen ions; liquid compound with a pH less than 2.

  • acidosis

    Acid-base imbalance of the body characterized by a pH less than 7.35.

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