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


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  • hemostasis

    Control of bleeding.

  • hepatic

    Having to do with the liver.

  • hepatitis

    Inflammation or infection of the liver.

  • heredity

    Transmission of genetic traits from parents to children.

  • hermaphrodite

    A person with both male and female sex organs.

  • hernia

    An abnormal protrusion of part of an organ through an abnormal opening.

  • herpes

    A recurring viral skin infection characterized by clusters of small blisters. Typically, sores are located near the mouth (fever blisters…

  • heterosexual

    Having to do with the opposite sex.

  • hexachlorophene

    A detergent that kills germs.

  • hiccup

    A sudden, involuntary spasm of the diaphragm. The sound of hiccups is caused by the sudden intake of air.

  • hidradenitis

    Inflammation of the sweat glands.

  • hip

    The part of the body surrounding the joint between the femur and pelvic bones.

  • hirsutism

    Excessive hair growth, usually on the face and chest. Often caused by an imbalance in hormones.

  • histamine

    A substance released from certain cells in response to allergens, associated with the development of allergic symptoms, including itchy eyes,…

  • histoplasmosis

    A fungal disease caused by inhaling the spores of Histoplasma capsulatum.

  • HIV

    Human immunodeficiency virus. A virus that slowly destroys the immune system. The virus that causes AIDS.

  • hives

    A skin reaction characterized by swelling, itching and burning.

  • Hodgkin's disease

    A progressive form of lymphoma usually characterized by weakness, swollen lymph nodes, sweating, fever and weight loss.

  • homeopathy

    Medical treatment based on the theory that certain diseases can be cured by giving very small doses of substances that,…

  • homogenize

    To make more uniform in quality or consistency.

  • homosexual

    Having to do with the same sex.