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steady state



  1. any condition in which the formation or introduction of substances just keeps pace with their destruction or removal so that all volumes, concentrations, pressures, and flows remain constant;
  2. in enzyme kinetics, conditions in which the rate of change in the concentration of any enzyme species (free enzyme or the enzyme-substrate binary complex) is zero or much less than the rate of product formation.
  3. a state obtained in moderate muscular exercise, when the removal of lactic acid by oxidation keeps pace with its production, the oxygen supply being adequate, and the muscles do not go into debt for oxygen;

[The abbreviations s and ss often appear in subscript.]

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.