Dictionary of Medical Terms

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 V

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vaccination

Inoculation with weakened or dead microorganisms to develop immunity and prevent disease caused by the regular strain of that…
vaccine

A preparation of killed or weakened microorganisms, given to treat or prevent disease.
vagina

The muscular canal in women between the vulva and the uterus. It serves as the entry for spermatozoa and as…
vaginismus

Painful spasm of the vagina.
varicocele

Dilated veins in the spermatic cord above or around the testis that can cause decreased sperm production on the affected…
varicose veins

Swollen, distended veins especially visible in the legs.
vas deferens

The duct through which sperm travels from the testicle to the urethra of the penis.
vascular

Of or having vessels, particularly the blood vessels.
vasculitis

Inflammation of the walls of the small blood vessels.
vasectomy

Surgical removal or tying of the vas deferens to prevent the passing of sperm. Used as a form of birth…
vasoconstriction

Causing the narrowing or closing (constriction) of blood vessels.
vasodilation

Causing the widening or opening (dilation) of blood vessels.
vector

An animal that spreads an infectious agent from one host to another. Also called a carrier.
vein

A vessel that carries blood from the various parts of the body to the heart.
venom

A toxin secreted by an animal.
venous

Having to do with a vein.
ventricle

1. Either of the two chambers that contract to pump blood from the heart. 2. Any of several small fluid-filled…
verruca

A small, hard, abnormal growth of the skin or mucous membranes caused by a virus.
vertebrae

The bones that make up the spine.
vertigo

A spinning sensation often accompanied by mild to severe nausea.
vesicle

1. A small, sac-like cavity. 2. A blister.