• A state of balance among all the body systems needed for the body to survive and function correctly. In homeostasis, body levels of acid, blood pressure, blood sugar, electrolytes, energy, hormones, oxygen, proteins, and temperature are constantly adjusted to respond to changes inside and outside the body, to keep them at a normal level.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• Processes whereby the internal environment of an organism tends to remain balanced and stable.
  CRISP Thesaurus
  National Institutes of Health, 2006
• The body's ability to keep blood pressure, temperature, water levels, oxygen levels, and more set at the right levels for cells to survive.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• The processes whereby the internal environment of an organism tends to remain balanced and stable.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• (homeostatic process) Any biological process involved in the maintenance of an internal steady state.
  Gene Ontology Dictionary
  Gene Ontology Consortium, 2021
• (homeostatic process) The body's maintenance of a consistent internal environment within a narrow range of variation. It is important to the continuation of life.
  NCI
  U.S. National Cancer Institute, 2021
• Homeostasis, any self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival. If homeostasis is successful, life continues; if unsuccessful, disaster or death ensues. The stability attained is actually a dynamic...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025