basal metabolic rate

noun Physiology.
the rate at which energy is expended in a basal condition, calculated as calories per hour per square meter of body surface and compared with a normal standard expressed as the percentage above or below the amount of oxygen normally used at rest, −15 to +5 percent being considered normal. Abbreviation: BMR

Origin:
1920–25

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Collins
World English Dictionary
basal metabolic rate
 
n
BMR the rate at which heat is produced by the body at rest, 12 to 14 hours after eating, measured in kilocalories per square metre of body surface per hour

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

basal metabolic rate n.

Abbr. BMR The rate at which energy is used by an organism at complete rest, measured in humans by the heat given off per unit time, and expressed as the calories released per kilogram of body weight or per square meter of body surface per hour.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
basal metabolic rate  
The rate at which energy is used by an organism at complete rest, measured in humans by the heat given off per unit time, and expressed as the calories released per kilogram of body weight or per square meter of body surface per hour.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

basal metabolic rate

index of the general level of activity of an individual's body metabolism, determined by measuring his oxygen intake in the basal state-i.e., during absolute rest, but not sleep, 14 to 18 hours after eating. The higher the amount of oxygen consumed in a certain time interval, the more active is the oxidative process of the body and the higher is the rate of body metabolism. The BMR has been used in measuring the general metabolic state during therapy. It was formerly widely used to assess thyroid function, since the thyroid hormones are prime regulators of tissue oxidation and metabolism; but, since the advent of radioactive-isotope tests and thyroid-hormone studies, BMR measurements have fallen into disuse.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Your basal metabolic rate decreases and you may find yourself gaining fat more easily.
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