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Dictionary

Gain a better understanding of medical terminology by searching our dictionary of more than 1,300 terms.

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All terms that start with the letter H
  • hymen

    The membrane partly or completely closing the opening to the vagina.

  • hyperbaric

    Characterized by greater-than-normal pressure. Hyperbaric oxygen is a therapeutic treatment designed to increase blood oxygen by delivering oxygen in a…

  • hyperemesis gravidarum

    Excessive morning sickness.

  • hyperglycemic

    High blood sugar.

  • hyperparathyroidism

    A condition caused by the overexcretion of parathyroid hormone resulting in changes in the bone and an elevated level of…

  • hypertension

    Abnormally high blood pressure.

  • hyperthyroidism

    Overproduction of thyroid hormone.

  • hyperventilation

    Rapid or deep breathing producing faintness, numbness, chest pain, apprehension and tingling, and spasms of the extremities.

  • hypnosis

    A sleep-like state induced by the suggestions of a hypnotist.

  • hypnotic

    1. Having to do with hypnosis. 2. Causing sleep.

  • hypochondriac

    Abnormal anxiety about one’s health, often to the point of believing one is suffering from a serious disease.

  • hypodermic

    Beneath the skin.

  • hypoglycemia

    Low blood sugar.

  • hypoparathyroidism

    Parathyroid hormone insufficiency due to lack of secretion of the parathyroid gland.

  • hypopituitarism

    Deficient activity of the pituitary gland causing slowed growth in children, fatigue and decreased appetite in adults, and cessation of…

  • hyposensitization

    To treat with frequent, small injections of an antigen to decrease the symptoms of an allergy to that antigen. Also…

  • hypospadias

    An abnormal opening of the urethra on the underside of the penis or into the vagina.

  • hypothalamus

    The portion of the brain responsible for temperature regulation and control of the pituitary gland.

  • hypothermia

    Low body temperature.

  • hypothyroidism

    A condition of low thyroid hormone production resulting in weight gain, hair loss, sluggishness and thickening of the skin.

  • hypoxia

    An abnormal condition resulting from decreased availability of oxygen in the body tissues.

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