| steady | 1. Firm in standing or position; not tottering or shaking; fixed; firm. "The softest, steadiest plume." "Their feet steady, their hands diligent, their eyes watchful, and their hearts resolute." (Sir P. Sidney) 2. Constant in feeling, purpose, or pursuit; not fickle, changeable, or wavering; not easily moved or persuaded to alter a purpose; resolute; as, a man steady in his principles, in his purpose, or in the pursuit of an object. 3. Regular; constant; undeviating; uniform; as, the steady course of the sun; a steady breeze of wind. Synonym: Fixed, regular, uniform, undeviating, invariable, unremitted, stable. <machinery> Steady rest, a rest in a turning lathe, to keep a long piece of work from trembling. Origin: Cf. AS. Stedig sterile, barren, staeig, steady (in gestaeig), D. Stedig, stadig, steeg, G. Statig, stetig. See Stead. Source: Websters Dictionary (01 Mar 1998) |
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| steady state | A dynamic equilibrium. (13 Nov 1997) |
| steady-state rate | The velocity of an enzyme-catalyzed reaction in which, over the time course of the study, the concentration of any enzyme species is constant (i.e., for an enzyme-substrate binary complex, ES, d[ES]/dt&apprxeq;00; for this to hold true, the total enzyme concentration must be much less than the initial substrate concentration. Synonym: steady-state rate. (05 Mar 2000) |
| steady-state velocity | The velocity of an enzyme-catalyzed reaction in which, over the time course of the study, the concentration of any enzyme species is constant (i.e., for an enzyme-substrate binary complex, ES, d[ES]/dt&apprxeq;00; for this to hold true, the total enzyme concentration must be much less than the initial substrate concentration. Synonym: steady-state rate. (05 Mar 2000) |
| post-steady state | Any period of time, particularly in an enzyme-catalyzed reaction, after the steady-state interval; e.g., when the rate of product formation is declining in an enzyme-catalyzed reaction. (05 Mar 2000) |
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| pre-steady state | Those conditions and the time interval prior to establishment of steady state. (05 Mar 2000) |