endergonicadj.

Brit.

/ˌɛndəːˈɡɒnɪk/, U.S.

/ˌɛndˌərˈɡɑnɪk/

Origin: A borrowing from Greek, combined with English elements. Etymons: endo- prefix and comb. form, Greek ἔργον , -ic suffix.

Etymology: < endo- prefix and comb. form + ancient Greek ἔργον work (see erg n.¹) + -ic suffix. Compare exergonic adj.

Chemistry and Biochemistry.

Of a chemical or metabolic process: requiring the supply of energy, the products having a greater free energy than the reactants. Contrasted with exergonic. Cf. endothermic adj.

ΚΠ

1940 C. D. Coryell in Science 25 Oct. 380/2 We therefore propose that the term ‘exergonic’ be applied to reactions which can produce work, and ‘endergonic’ be applied to those on which work must be expended to cause the reaction to occur.

1953 G. E. Fogg Metabolism of Algae ii. 17 Photosynthesis is endergonic and proceeds with an accumulation of at least 112 k-cal. per mole of carbon dioxide reduced.

1988 Nature 17 Nov. 209/3 Thioesters could..have fuelled all the endergonic steps of protometabolism.

2006 J. M. Hornback Org. Chem. (Internat. Student ed.) viii. 260 Reactions in which the free-energy change is positive are endergonic and are not spontaneous.

This is a new entry (OED Third Edition, June 2018; most recently modified version published online March 2022).

单词	endergonic
释义	endergonicadj. Brit. /ˌɛndəːˈɡɒnɪk/, U.S. /ˌɛndˌərˈɡɑnɪk/ Origin: A borrowing from Greek, combined with English elements. Etymons: endo- prefix and comb. form, Greek ἔργον , -ic suffix. Etymology: < endo- prefix and comb. form + ancient Greek ἔργον work (see erg n.¹) + -ic suffix. Compare exergonic adj. Chemistry and Biochemistry. Of a chemical or metabolic process: requiring the supply of energy, the products having a greater free energy than the reactants. Contrasted with exergonic. Cf. endothermic adj. ΚΠ 1940 C. D. Coryell in Science 25 Oct. 380/2 We therefore propose that the term ‘exergonic’ be applied to reactions which can produce work, and ‘endergonic’ be applied to those on which work must be expended to cause the reaction to occur. 1953 G. E. Fogg Metabolism of Algae ii. 17 Photosynthesis is endergonic and proceeds with an accumulation of at least 112 k-cal. per mole of carbon dioxide reduced. 1988 Nature 17 Nov. 209/3 Thioesters could..have fuelled all the endergonic steps of protometabolism. 2006 J. M. Hornback Org. Chem. (Internat. Student ed.) viii. 260 Reactions in which the free-energy change is positive are endergonic and are not spontaneous. This is a new entry (OED Third Edition, June 2018; most recently modified version published online March 2022). < adj.1940
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