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| pace·mak·er [ páyss màykər ] (plural pace·mak·ers) |
noun |
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| Definition: |
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1. device that regulates heartbeat: a battery-operated electrical device inserted into the body to deliver small regular shocks that stimulate the heart to beat in a normal rhythm
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2. natural heartbeat regulator: a small area of specialized heart-muscle tissue in the wall of the upper right chamber of the heart that sends out rhythmic electrical impulses to regulate the heartbeat
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3. competitor who sets pace: a competitor in a race who sets the speed at which the whole or part of the race is run
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4.
Same as pacesetter (sense 1)
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