basal metabolic rate

This term is a technical medical and physiological descriptor used primarily in clinical, nutritional, and athletic contexts. It describes the energy expenditure of a body at absolute rest, excluding any activity related to digestion or physical movement. It is often contrasted with the Total Daily Energy Expenditure (TDEE), which includes the BMR plus additional calories burned through activity.

Because it refers to a specific biological measurement, the term is treated as a singular conceptual unit. In professional settings, it is frequently abbreviated as BMR. It is almost always used in a neutral, scientific register to discuss weight management, metabolic health, or physiological efficiency.