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


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  • gastric

    Having to do with the stomach.

  • gastritis

    Inflammation of the stomach lining.

  • gastroenteritis

    Inflammation of the stomach and the intestines, usually producing symptoms of nausea, vomiting and diarrhea.

  • gastrointestinal

    Having to do with the stomach and intestines.

  • gene

    A unit of heredity located on a chromosome.

  • generic

    1. General; typical; not specific. 2. Medicine that’s not a name brand.

  • genetic

    Hereditary. Having to do with the genes.

  • genitalia

    The reproductive organs.

  • genitourinary system

    The genitals and urinary organs.

  • geriatrics

    The branch of medicine devoted to the elderly.

  • germ

    A disease-causing microorganism.

  • German measles

    A mild childhood disease that causes fever and rash. Although rubella is mild in childhood, it’s dangerous to pregnant women…

  • gestation

    The period of development within the uterus from conception to birth.

  • giantism

    Abnormal growth of the body due to an excessive amount of growth hormone produced by the pituitary gland.

  • giardiasis

    A diarrheal illness caused by infection with Giardia lamblia, a parasitic protozoan.

  • gingiva

    The gums.

  • gingivitis

    Inflammation of the gums.

  • gland

    An organ that releases a chemical. Endocrine glands are ductless and secrete hormones directly into the bloodstream. Exocrine glands secrete…

  • glaucoma

    An eye disease, characterized by increased pressure within the eye, that can result in blindness if not treated.

  • glomerulonephritis

    When the filtering units in the kidneys, called the glomeruli, are damaged, the kidneys don’t function properly and waste and…

  • glossitis

    Inflammation of the tongue.