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heart rate

noun
1.
the number of heartbeats per minute.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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heart rate in Medicine

heart rate n.
Abbr. HR
The number of heartbeats per unit of time, usually expressed as beats per minute.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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heart rate in Science
heart rate  
The number of heartbeats per unit of time, usually expressed as beats per minute.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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