homeostasis

n.

1.

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.

Noun

1.

homeostasis - metabolic equilibrium actively maintained by several complex biological mechanisms that operate via the autonomic nervous system to offset disrupting changes

aplomb, balance, balanced personality, constancy, cool, equilibrium, fastness, firmness, imperturbability, invariability, nerve, reliability, rootedness, sang-froid, secureness, security, solidity, soundness, stability, stable equilibrium, stable state, steadfastness, steadiness, steady nerves, steady state, substantiality, undeflectability, uniformity, unshakable nerves, unshakableness