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Kell blood group

(kel) [Named after the family in whom the blood group was first discovered in 1946] One of the human blood groups. It is composed of three forms of antigens present on the surface of the red blood cells. SEE: blood group.


(kē′loyd″) [kelis or Gr. chēlē, claw + -oid] An exuberant scar that forms at the site of an injury or incision and spreads beyond the borders of the original lesion. The scar is made up of a swirling mass of collagen fibers and fibroblasts. Grossly it appears to have a shiny surface and a rubbery consistency. The most common locations for keloid formation are on the shoulders, chest, and back. SEE: illus.





TREATMENT: The injection of a corticosteroid sometimes helps the lesion regress. Freezing the tissue with liquid nitrogen, applying pressure dressings, treating it with lasers, excising it, or a combination of these treatments may be used, but recurrences are frequent.

acne k. A keloid that develops at the site of an acne pustule.


(kē″loyd″ō′sĭs) [keloid + -osis] The formation of keloids.


(kelp) 1. Any member of the brown seaweeds of the order Laminariales. 2. The ash of seaweed from which potassium and iodine salts are prepared.

Kelvin, Lord

(kel′vĭn) Sir William Thomson (First Baron Kelvin of Largs), Brit. physicist, 1824–1907.

K. scale The temperature scale that uses the kelvin as the unit of measurement and in which absolute zero is equal to minus 273.15° on the Celsius scale. On the Kelvin scale the freezing point of water is 273.15°K, and the boiling point 373.15°K.

K. thermometer A thermometric scale in which absolute zero is 0°K; the freezing point of water is 273.15°K; and the boiling point of water is 373.15°K. Thus 1°K on the Kelvin scale is exactly equivalent to 1°C.

Kendrick Extrication Device

(kĕn′drĭk) ABBR: KED. A vest-type immobilizer designed to limit movement of the cervical and thoracic spine in seated patients with suspected spinal cord injuries.

Kent bundle

(kent) [Albert Frank Stanley Kent, Brit. physiologist, 1863–1958] Any of the accessory conduction fiber bundles in the heart that rapidly convey atrial impulses across the atrioventricular tissue. They are usually present in the Wolff-Parkinson-White syndrome. SEE: Wolff-Parkinson-White syndrome.


(ker″ă-tek-tā′zh(ē-)ă) [kerato- + ectasia] Conical protrusion of the cornea.


(ker″ă-tek′tŏ-mē) [kerato- + -ectomy] Excision of a portion of ...

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