photochemicaladj.

Brit.

/ˌfəʊtə(ʊ)ˈkɛmᵻkl/, U.S.

/ˌfoʊdəˈkɛmək(ə)l/

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

Etymology: < photo- comb. form + chemical adj. Compare photochemically adv. and later photochemic adj.

Of or relating to the chemical action of light (or similar radiation). Cf. photochemistry n.

ΘΚΠ

the world > matter > chemistry > chemistry as a science > branches of chemistry > [adjective]

mago-chemical1652

physico-chemical1664

chemico-medical1744

unorganic1775

pneumato-chemical1790

electrochemical1808

electrochemic1813

zymological1828

photochemical1858

thermochemical1871

physiochemical1881

stoicheiometrical1887

stereo-chemical1890

stoicheiometric1892

physical-chemical1896

zymotechnic1896

zymotechnical1900

photochemic1907

magnetochemical1911

immunochemical1912

radiochemical1915

topochemical1920

palaeochemical1926

cosmochemical1940

mechanochemical1943

radiation-chemical1946

sonochemical1948

stereological1963

bioinorganic1970

thermochemic-

the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [adjective] > of chemical action of light

photochemical1858

1858 Philos. Trans. 1857 (Royal Soc.) 147 355 Certain conditions..must be fulfilled, if exact photo-chemical measurements with chlorine and hydrogen are required.

1859 Sat. Rev. 26 Feb. 242/1 The use of that bichromate of potassium to which we alluded before as the foundation of so many of these ingenious combinations of photochemical changes and mechanical inventions.

1924 A. J. Allmand & H. J. T. Ellingham Princ. Appl. Electrochem. (ed. 2) xii. 196 It is very likely that, at all events in the silent discharge, photochemical effects are present.

1957 G. E. Hutchinson Treat. Limnol. I. iv. 222 Mars may have lost more water than the earth by photochemical decomposition and by the subsequent escape of hydrogen.

1972 C. H. DePuy & O. L. Chapman Molecular Reactions & Photochem. iv. 63 Aromatic compounds undergo many photochemical transformations.

2000 S. Garfield Mauve 130 He mentioned artificial vanillin and violet and photochemical products.

Compounds

photochemical smog n. a condition of the atmosphere attributed to the action of sunlight on hydrocarbons and nitrogen in it, and characterized by the presence of aerosols and increased ozone and nitrogen oxides and by effects that include irritation of the eyes, damage to plants, and visibility reduced to a mile (1.6 km) or less.

ΘΚΠ

the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > environmental pollution > [noun] > bad air > specific

smokiness1587

mephitism1801

smog1905

photochemical smog1957

vog1969

the world > the earth > weather and the atmosphere > weather > cloud > mist > [noun] > thick mist or fog > fog mixed with smoke > specific

photochemical smog1957

1957 Rep. Air Pollution Foundation (U.S.) No. 21. 1 It is now realized that Los Angeles' smog is primarily a reaction between organic matter and nitrogen oxides in the presence of sunlight. The need for irradiation to produce the reaction has led to the designation ‘photochemical’ smog.

1976 New Yorker 16 Feb. 74/2 Los Angeles is perhaps the best-known victim of the bus and the automobile; photochemical smog, the distinctive pollutant of these vehicles, made its first recorded appearance in Los Angeles in 1943.

1990 Green Mag. Apr. 79/2 (caption) Solvents..help create photochemical smog which harms lungs and plants.

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

单词	photochemical
释义	photochemicaladj. Brit. /ˌfəʊtə(ʊ)ˈkɛmᵻkl/, U.S. /ˌfoʊdəˈkɛmək(ə)l/ Origin: Formed within English, by compounding. Etymons: photo- comb. form, chemical adj. Etymology: < photo- comb. form + chemical adj. Compare photochemically adv. and later photochemic adj. Of or relating to the chemical action of light (or similar radiation). Cf. photochemistry n. ΘΚΠ the world > matter > chemistry > chemistry as a science > branches of chemistry > [adjective] mago-chemical1652 physico-chemical1664 chemico-medical1744 unorganic1775 pneumato-chemical1790 electrochemical1808 electrochemic1813 zymological1828 photochemical1858 thermochemical1871 physiochemical1881 stoicheiometrical1887 stereo-chemical1890 stoicheiometric1892 physical-chemical1896 zymotechnic1896 zymotechnical1900 photochemic1907 magnetochemical1911 immunochemical1912 radiochemical1915 topochemical1920 palaeochemical1926 cosmochemical1940 mechanochemical1943 radiation-chemical1946 sonochemical1948 stereological1963 bioinorganic1970 thermochemic- the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [adjective] > of chemical action of light photochemical1858 1858 Philos. Trans. 1857 (Royal Soc.) 147 355 Certain conditions..must be fulfilled, if exact photo-chemical measurements with chlorine and hydrogen are required. 1859 Sat. Rev. 26 Feb. 242/1 The use of that bichromate of potassium to which we alluded before as the foundation of so many of these ingenious combinations of photochemical changes and mechanical inventions. 1924 A. J. Allmand & H. J. T. Ellingham Princ. Appl. Electrochem. (ed. 2) xii. 196 It is very likely that, at all events in the silent discharge, photochemical effects are present. 1957 G. E. Hutchinson Treat. Limnol. I. iv. 222 Mars may have lost more water than the earth by photochemical decomposition and by the subsequent escape of hydrogen. 1972 C. H. DePuy & O. L. Chapman Molecular Reactions & Photochem. iv. 63 Aromatic compounds undergo many photochemical transformations. 2000 S. Garfield Mauve 130 He mentioned artificial vanillin and violet and photochemical products. Compounds photochemical smog n. a condition of the atmosphere attributed to the action of sunlight on hydrocarbons and nitrogen in it, and characterized by the presence of aerosols and increased ozone and nitrogen oxides and by effects that include irritation of the eyes, damage to plants, and visibility reduced to a mile (1.6 km) or less. ΘΚΠ the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > environmental pollution > [noun] > bad air > specific smokiness1587 mephitism1801 smog1905 photochemical smog1957 vog1969 the world > the earth > weather and the atmosphere > weather > cloud > mist > [noun] > thick mist or fog > fog mixed with smoke > specific photochemical smog1957 1957 Rep. Air Pollution Foundation (U.S.) No. 21. 1 It is now realized that Los Angeles' smog is primarily a reaction between organic matter and nitrogen oxides in the presence of sunlight. The need for irradiation to produce the reaction has led to the designation ‘photochemical’ smog. 1976 New Yorker 16 Feb. 74/2 Los Angeles is perhaps the best-known victim of the bus and the automobile; photochemical smog, the distinctive pollutant of these vehicles, made its first recorded appearance in Los Angeles in 1943. 1990 Green Mag. Apr. 79/2 (caption) Solvents..help create photochemical smog which harms lungs and plants. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < adj.1858
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