Definition: an abnormally low body temperature, often caused by prolonged exposure to cold water during open water races, especially when combined with chilly winds, pronounced fatigue for swimmers with a low body fat percentage. Hypothermia is medically defined when the core body temperature drops below 35ºC (95ºF). Mild hypothermia may be identified by increased shivering or vasoconstriction. Severe hypothermia includes altered cognition, unusual behavior, weakness, apathy, reduced cardiac output, and even coma. (noun)
Examples:
The swimmer was pulled from the water when it become obvious that she was suffering from hypothermia.
