- The total of all chemical changes that take place in a cell or an organism. These changes produce energy and basic materials needed for important life processes.
Definition from: Physician Data Query via Unified Medical Language System at the National Library of Medicine
- Biochemical changes in the cells, digestive system, and body tissues by which energy is provided, new material is incorporated, and substances, such as drugs, are disposed.
Definition from: Psychological Index Terms via Unified Medical Language System at the National Library of Medicine
Related discussion in the Handbook
See also Understanding Medical Terminology.