| second-order kinetics | A term describing the reaction rate of a chemical reaction in which the rate is proportional to the product of the concentrations (in moles) of two of the reactants (also called bimolecular kinetics), or to the square of the molar concentration of the reactant if there is only one. Such a reaction might have an equation like rate = k[A][B] or rate = k[A]2, where k is the reaction rate constant, [A] is the concentration of reactant A, and [B] is the concentration of reactant B. (09 Oct 1997) |
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| second-stability region | <radiobiology> A high pressure region where the plasma becomes stable to the pressure-gradient-driven ballooning instability. The plasma is stable in the limit of small pressure gradients, becomes unstable at some intermediate pressure, and then becomes stable again at still higher pressures. Tokamaks operating in the second-stability region would be more attractive because the higher pressures (beta) would provide more fusion reactivity per unit volume of plasma, allowing smaller reactors to be built. (09 Oct 1997) |
| secondaries | Synonym: metastasis. 2. The lesions of secondary syphilis. (05 Mar 2000) |
| secondarily | 1. In a secondary manner or degree. 2. Secondly; in the second place. "God hath set some in the church, first apostels, secondarily prophets, thirdly teachers." (1 Cor. Xii. 28) Source: Websters Dictionary (01 Mar 1998) |
| secondarily generalised tonic-clonic seizure | A generalised tonic-clonic seizure that begins with a partial seizure and evolves into a generalised tonic-clonic seizure. (05 Mar 2000) |
| secondary | Second or inferior in order of time, place or importance, derived from or consequent to a primary event or thing. Origin: L. Secundarius, secundus = second (18 Nov 1997) |
| secondary abdominal pregnancy | A condition in which the embryo or foetus continues to grow in the abdominal cavity after its expulsion from the fallopian tube or other seat of its primary development. Synonym: abdominocyesis. (05 Mar 2000) |
| secondary adhesion | Delayed closure of two granulating surfaces. Synonym: secondary adhesion, secondary union. (05 Mar 2000) |
| secondary adrenocortical insufficiency | Adrenocortical insufficiency caused by failure of ACTH secretion resulting from anterior pituitary disease or inhibition of ACTH production resulting from exogenous steroid therapy. (05 Mar 2000) |
| secondary aerodontalgia | Pain referred to the dental area from an area of aerosinusitis. (05 Mar 2000) |
| secondary agammaglobulinaemia | Immunodeficiency in which there is no evident defect in the lymphoid tissues, but rather hypercatabolism or loss of immunoglobulins such as occurs in familial idiopathic hypercatabolic hypoproteinaemia or in defects associated with the nephrotic syndrome. Synonym: secondary agammaglobulinaemia, secondary antibody deficiency, secondary hypogammaglobulinaemia. (05 Mar 2000) |
| secondary alcohol | An alcohol characterised by the bivalent atom group (05 Mar 2000) |
| secondary aldosteronism | Aldosteronism resulting not from a defect intrinsic to the adrenal cortex but from a stimulation of hormonal secretion caused by extra-adrenal disorders; associated with increased plasma renin activity and occurs in heart failure, nephrotic syndrome, cirrhosis, and hypoproteinaemia. (05 Mar 2000) |
| secondary amenorrhoea | Amenorrhoea in which the menses appeared at puberty but subsequently ceased. (05 Mar 2000) |
| secondary amine monooxygenase | <enzyme> Catalyses NADH or NADPH dependent oxidative n-dealkylation of short chain aliphatic secondary amines with a methyl or ethyl group Registry number: EC 1.14.99.- Synonym: dimethylamine mono-oxygenase, secondary amine mono-oxygenase (26 Jun 1999) |