Category: H
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Helminthoid
Wormlike or resembling a worm.
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Helmet cell
A schistocyte or fragmented blood cell, seen in hemolytic anemias.
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Hellerwork
A therapeutic approach emphasizing deep massage, movement exercises, and verbal dialogue to encourage relaxation, release tight connective tissue, and promote general health. A complex form of bodywork/massage named for its founder Joseph Heller. Heller began as a student of Ida P. Rolf, who had developed a form of mas¬ sage distinctive for its manipulation of…
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Helium 3
An isotope of helium whose nucleus contains two protons and a single neutron. Helium 3 is a stable gas. The isotope is polarizable, making it suitable as a gaseous contrast agent for use in magnetic resonance imaging.
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Helicase
A donut-shaped enzyme that uncoils double-stranded DNA, allowing it to replicate. Syndromes in humans in which helicase is deficient predispose these people to premature aging or cancer.
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Heiner’s syndrome
Allergic intolerance to cow’s milk. This disorder is primarily identified in young children with recurrent episodes of rhinitis, earache, and bleeding into the lungs, usually associated with stunted growth. Affected children do well with a diet that minimizes exposure to cow’s milk or its derivatives. Corticosteroids are sometimes used during acute episodes to reduce inflammation…
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Height
The vertical distance from the bottom to the top of an organ or structure.
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Heidenhain’s demilunes
Crescent-shaped groups of serous cells at the base, or along the sides, of the mucous alveoli of the salivary glands, especially sublingual and submandibular.
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Heerfordt’s disease
Uveo-parotid fever, a form of sarcoidosis, marked by enlargement of the parotid gland, inflammation of the uveal tract, and prolonged low-grade fever.
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Heel puncture
A method for obtaining a blood sample from a newborn or premature infant.