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vitiligo
A skin condition characterized by sharply defined white patches that contain no skin color (pigment).
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vitamin
An organic substance found in food and essential in small quantities for good health.
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vision
The sense of sight.
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viscera
The large internal organs.
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virus
The agent of an infectious disease, smaller than bacteria, that must have a living host in order to grow or…
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vesicourethral reflux
An abnormal condition that allows urine to flow from the bladder back into a ureter.
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vesicle
1. A small, sac-like cavity. 2. A blister.
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vertigo
A spinning sensation often accompanied by mild to severe nausea.
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vertebrae
The bones that make up the spine.
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verruca
A small, hard, abnormal growth of the skin or mucous membranes caused by a virus.
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ventricle
1. Either of the two chambers that contract to pump blood from the heart. 2. Any of several small fluid-filled…
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venous
Having to do with a vein.
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venom
A toxin secreted by an animal.
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vein
A vessel that carries blood from the various parts of the body to the heart.
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vector
An animal that spreads an infectious agent from one host to another. Also called a carrier.
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vasodilation
Causing the widening or opening (dilation) of blood vessels.
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vasoconstriction
Causing the narrowing or closing (constriction) of blood vessels.
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vasectomy
Surgical removal or tying of the vas deferens to prevent the passing of sperm. Used as a form of birth…
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vasculitis
Inflammation of the walls of the small blood vessels.
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vascular
Of or having vessels, particularly the blood vessels.
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vas deferens
The duct through which sperm travels from the testicle to the urethra of the penis.