Definition for Basal metabolic rate (BMR)
From Biology Forums Dictionary
1) The metabolic rate of an animal under resting conditions, in good health, and not under stress of any kind.
2) Basal metabolic rate (BMR) is the amount of heat produced by the body at rest based on the amount of energy, or kilocalories, needed to operate per hour. Essential life operations include breathing, heart beat, kidney functions, etc.