photolysisn.

Brit.

/fə(ʊ)ˈtɒlᵻsɪs/, U.S.

/foʊˈtɑləsəs/

Origin: Formed within English, by compounding. Etymons: photo- comb. form, -lysis comb. form.

Etymology: < photo- comb. form + -lysis comb. form. In sense 2 after electrolysis n.

†1. Botany. The movement of the chloroplasts of a plant cell as a result of exposure to light. Cf. apostrophe n.¹ 2, epistrophe n. 3, systrophe n. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Photolysis, the movements of protoplasm under the influence of light.

2. Chemistry. Decomposition or dissociation of molecules by the action of light; an instance of this.flash photolysis: see flash n.² Compounds 1b.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > study of chemical action of light > decomposition

photolysis1903

1903 C. Timiriazeff in Proc. Royal Soc. 72 431 The dissociation of carbon dioxide represented by this curve (fig. 4), the ‘photolysis’, as it may be called, is the first and by far the most important stage of the whole process, being directly dependent on the external source of energy.

1955 Jrnl. Amer. Chem. Soc. 77 6457/2 Most of the photolyses were carried out at room temperature.

1972 R. A. Jackson Mechanism iv. 61 Radicals may be introduced into reaction systems by photolysis or pyrolysis of a suitable molecule.

1991 Offshore Engineer Sept. 26/3 The work..involved characterisation of oil properties due to weathering, looking at evaporation, photolysis, emulsification and other complex effects.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	photolysis
释义	photolysisn. Brit. /fə(ʊ)ˈtɒlᵻsɪs/, U.S. /foʊˈtɑləsəs/ Origin: Formed within English, by compounding. Etymons: photo- comb. form, -lysis comb. form. Etymology: < photo- comb. form + -lysis comb. form. In sense 2 after electrolysis n. †1. Botany. The movement of the chloroplasts of a plant cell as a result of exposure to light. Cf. apostrophe n.¹ 2, epistrophe n. 3, systrophe n. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Photolysis, the movements of protoplasm under the influence of light. 2. Chemistry. Decomposition or dissociation of molecules by the action of light; an instance of this.flash photolysis: see flash n.² Compounds 1b. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > study of chemical action of light > decomposition photolysis1903 1903 C. Timiriazeff in Proc. Royal Soc. 72 431 The dissociation of carbon dioxide represented by this curve (fig. 4), the ‘photolysis’, as it may be called, is the first and by far the most important stage of the whole process, being directly dependent on the external source of energy. 1955 Jrnl. Amer. Chem. Soc. 77 6457/2 Most of the photolyses were carried out at room temperature. 1972 R. A. Jackson Mechanism iv. 61 Radicals may be introduced into reaction systems by photolysis or pyrolysis of a suitable molecule. 1991 Offshore Engineer Sept. 26/3 The work..involved characterisation of oil properties due to weathering, looking at evaporation, photolysis, emulsification and other complex effects. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1890
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