Frostbite

n. injury caused by exposure to severe cold

v. injure by exposing to severe cold, cause frostbite

Frostbite (congelatio in medical terminology) is the medical condition whereby damage is caused to skin and other tissues due to extreme cold. At or below 0° C (32° F), blood vessels close to the skin start to narrow (constrict). This helps to preserve core body temperature. In extreme cold or when the body is exposed to cold for long periods, this protective strategy can reduce blood flow in some areas of the body to dangerously low levels. The combination of cold temperature and poor blood flow can cause severe tissue injury by freezing the tissue. Frostbite is most likely to happen in body parts farthest from the heart, and those with a lot of surface area exposed to cold. The initial stages of frostbite are sometimes called "frostnip".
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Frostbite /frost·bite/ injury to tissues due to exposure to cold. frost·bite n. Injury or destruction of skin and underlying tissue, most often that [more]Frostbite - Community and Resources

Noun
1. destruction of tissue by freezing and characterized by tingling, blistering and possibly gangrene
(synonym) cryopathy
(hypernym) injury, hurt, harm, trauma
(hyponym) trench foot, immersion foot

(v. t.)
To expose to the effect of frost, or a frosty air; to blight or nip with frost.
  

(n.)
The freezing, or effect of a freezing, of some part of the body, as the ears or nose.