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hordeolum
Inflammation of a gland on the eyelid. Also called a stye.
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hormone
A substance formed in an organ of the body and carried by body fluids to another organ or tissue, where…
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host
An organism that harbors and provides sustenance for another organism.
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housemaid's knee
Swelling just below the kneecap, caused by the buildup of fluid in response to the constant pressure of kneeling.
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humerus
The bone in the upper arm.
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humidifier
A device for adding moisture to the air.
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Huntington's chorea
A hereditary form of chorea (sudden, jerky motions of the arms or other parts of the body) that usually affects…
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hydatid
A cyst containing watery fluid and the larvae of certain tapeworms.
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hydatid disease
Infection with the larvae (cysts) of certain tapeworms.
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hydatidiform mole
A cystic tumor of the placental tissues of an abnormal pregnancy. Complications of this disorder include bleeding and infection.
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hydrocele
A painless swelling of the scrotum caused by the buildup of fluid in the outer covering of the testes.
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hydrocephalus
An enlargement of the head caused by the buildup of fluid within the ventricles of the brain. Also called “water…
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hygiene
The science of health and its maintenance.
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hymen
The membrane partly or completely closing the opening to the vagina.
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hyperbaric
Characterized by greater-than-normal pressure. Hyperbaric oxygen is a therapeutic treatment designed to increase blood oxygen by delivering oxygen in a…
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hyperemesis gravidarum
Excessive morning sickness.
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hyperglycemic
High blood sugar.
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hyperparathyroidism
A condition caused by the overexcretion of parathyroid hormone resulting in changes in the bone and an elevated level of…
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hypertension
Abnormally high blood pressure.
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hyperthyroidism
Overproduction of thyroid hormone.
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hyperventilation
Rapid or deep breathing producing faintness, numbness, chest pain, apprehension and tingling, and spasms of the extremities.