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WordReference Random House Learner's Dictionary of American English © 2024pace•mak•er /ˈpeɪsˌmeɪkɚ/USA pronunciation n. [countable]- pacesetter.
- Medicinean electronic device surgically placed beneath the skin to provide a normal heartbeat by electrically stimulating the heart muscle.
WordReference Random House Unabridged Dictionary of American English © 2024pace•mak•er (pās′mā′kər),USA pronunciation n. - pacesetter.
- Medicinean electronic device implanted beneath the skin for providing a normal heartbeat by electrical stimulation of the heart muscle, used in certain heart conditions.
- Physiology, Anatomy[Anat., Physiol.]any specialized tissue that governs a rhythmic or cyclic biological activity, as the sinoatrial node of the heart that controls heartbeat.
pace′mak′ing, n. Collins Concise English Dictionary © HarperCollins Publishers:: pacemaker /ˈpeɪsˌmeɪkə/ n - a person, horse, vehicle, etc, used in a race or speed trial to set the pace
- a person, an organization, etc, regarded as being the leader in a particular field of activity
- Also called: cardiac pacemaker a small area of specialized tissue within the wall of the right atrium of the heart whose spontaneous electrical activity initiates and controls the beat of the heart
- Also called: artificial pacemaker an electronic device for use in certain cases of heart disease to assume the functions of the natural cardiac pacemaker
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