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pre-exponential
pre-exponential adj. 
/ˌpriˌɛkspoʊˈnɛn(t)ʃəl/ Mathematics occurring as a non-exponential multiplier of an exponential quantity.
Brit. /ˌpriːɛkspə(ʊ)ˈnɛnʃl/
, /ˌpriːɛkspə(ʊ)ˈnɛnʃl/U.S. /ˌpriˌɛkspəˈnɛn(t)ʃəl/
, /ˌpriˌɛkspəˈnɛn(t)ʃəl//ˌpriˌɛkspoʊˈnɛn(t)ʃəl/ΘΚΠ
the world > relative properties > number > calculus > [adjective] > other
partial1801
Runge–Kutta1930
differentiable1935
pre-exponential1940
1940 Proc. Royal Soc. A. 175 129 The pre-exponential terms in the equilibrium expression thus reduces [sic] to a ratio of the products of the vibrational partition functions of the active and normal molecules.
1970 Nature 12 Dec. 1086/1 The Arrhenius expression is a frequently erroneous semiempirical formula, with the temperature independence of the activation energy E and the pre-exponential factor A becoming increasingly questionable as the reaction temperature range broadens.
1998 Science 17 July 392/3 He found that the preexponential factor varied between 0.05 and 0.5 and the exponential term between −0.63 and −0.91.
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