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Dictionary · Word part

angi/o

A word root that means vessel, usually a blood vessel.

AN-jee-oh root

What it means

The root in words about blood and lymph vessels. Angiography is an x-ray of vessels with dye, angioplasty is opening a narrowed vessel with a balloon, and angioedema is swelling in deeper tissue. The root vas/o also means vessel, as in vasodilation and vasoconstriction.

At a glance

Also writtenangio-, angi-

Related terms

cardi/o

A word part that means heart.

capillary

One of the tiniest blood vessels, joining the smallest arteries to the smallest veins.

vein

A blood vessel that carries blood back toward the heart.

artery

A blood vessel that takes blood from the heart out to the body.

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