This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The ability or tendency of an organism or cell to maintain internal equilibrium by adjusting its physiological processes.

n. The ability of a system or living organism to adjust its internal environment to maintain a stable equilibrium; such as the ability of warm-blooded animals to maintain a constant temperature.

n. Such a dynamic equilibrium or balance.

n. The ability and tendency of certain systems to maintain a relatively constant internal state in spite of changes in external conditions; this ability is achieved by the presence of feedback mechanisms which can adjust the state of the system to compensate for changes in the state caused by the external environment. It is exemplified in homeothermal biological systems, such as animals which maintain relatively constant blood temperature and composition in spite of variations in external temperature or the composition of the food ingested.

n. (physiology) metabolic equilibrium actively maintained by several complex biological mechanisms that operate via the autonomic nervous system to offset disrupting changes

"Cannon (1932) applied the term homeostasis (coined by 18th-century physician Claude Bernard) to this powerful self-regulating capability."

equilibrium   

stasis   

metal homeostasis    homeostatic   

basis    glacis   

metabolism    uptake    apoptosis    differentiation    motility    synapse    proliferation    abnormality    permeability    activation