Definition

A substance or nerve that causes blood vessels to widen, which can help improve blood flow.

Example

Nitroglycerin is a common vasodilator used to treat heart conditions.

Conversation

Have you heard about the new drug that acts as a vasodilator?

No, I haven't. What does it do?

It helps widen blood vessels, which can improve blood flow.

That sounds interesting! I wonder how it affects exercise performance.

Synonyms & Antonyms

Root Explanation

Vasodilator → It is formed from "vaso-" (from Latin "vas" meaning vessel) and "dilator" (from Latin "dilatare" meaning to expand or widen). The word refers to a substance that causes blood vessels to expand or widen.

Memory Tip

Think of 'vessel' ('vaso-') being 'expanded' ('dilator') — that's why a vasodilator means something that makes blood vessels wider.

Visually Confused Words