Noun
1. The property of a system that regulates its internal environment and tends to maintain a stable, relatively constant condition of properties such as temperature or pH. It can be either an open or closed system. In simple terms, it is basically a process in which the body’s internal environment is kept stable. (wikipedia.org)
2. The processes whereby the internal Environment of an organism tends to remain balanced and stable. (online-medical-dictionary.org)
3. The maintenance of metabolic equilibrium within an animal by a tendency to compensate for disrupting changes. (Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers)
4. The maintenance of equilibrium within a social group, person, etc. (Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers)
adj., homeostatic (-sttk)
Word origin: From Greek: ὅμοιος, “hómoios“, “similar”, and στάσις, stásis, “standing still”