actinismn.

Brit.

/ˈaktᵻnɪz(ə)m/, U.S.

/ˈæktəˌnɪz(ə)m/

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ἀκτῖν- , ἀκτίς , -ism suffix.

Etymology: < ancient Greek ἀκτῖν-, ἀκτίς ray (see actino- comb. form) + -ism suffix.

1. The property by which light or other electromagnetic radiation causes chemical change, as in traditional photography and in photosynthesis. Also in extended use and in figurative contexts.Common in the 19th cent., but now much less common than the adjective actinic.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > solar radiation > [noun] > property causing chemical change

tithonicity1842

actinism1845

tithonism1855

the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > energy causing chemical changes

energy1844

tithonization1844

actinism1845

activism1856

1845 R. Hunt in Rep. Brit. Assoc. Advancem. Sci. 1844 30 By a most careful prismatic analysis of the rays..I have ascertained the relative quantity of the active chemical principle (Actinism).

1849 J. Lindley Elements Bot. (new ed.) 56 Mr. Hunt believes that the germination of seeds in the spring..is dependent upon the variations in the amount of actinism—or chemical influence—of light and of heat in the solar beam.

1883 Cent. Mag. 25 884 Work is poetic..whose quick similitudes have the heat, the light, the actinism, of the day-beam.

1896 N. Amer. Rev. Mar. 375 The common metals, iron and steel..are very impervious to the new actinism, while less useful ones, like silver, brass and aluminum, are much more transparent.

1913 Auk 30 75 The photograph will show a dominant purplish tone, owing to the excessive actinism of the violet and blue rays of ordinary light.

2002 Plant Cell 14 1069/2 (caption) Actinism of the monitoring light contributes to a crystal dark-state spectrum containing a small percentage of photoproduct.

†2. The radiation of heat or light (see quot. 1847). Obsolete. rare.Perhaps based on a misapprehension.Apparently only attested in dictionaries or glossaries.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > heat > [noun] > emission or diffusion

irradiation1794

radiance1800

radiation1802

actinism1847

scattering1866

emissivity1880

the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [noun]

irradiation1599

eradiation1633

radiature1663

diradiation1706

actinism1847

Cerenkov effect1940

superradiance1957

1847 J. Craig New Universal Dict. Actinism, the radiation of heat or light, or that branch of Philosophy which treats of it.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	actinism
释义	actinismn. Brit. /ˈaktᵻnɪz(ə)m/, U.S. /ˈæktəˌnɪz(ə)m/ Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ἀκτῖν- , ἀκτίς , -ism suffix. Etymology: < ancient Greek ἀκτῖν-, ἀκτίς ray (see actino- comb. form) + -ism suffix. 1. The property by which light or other electromagnetic radiation causes chemical change, as in traditional photography and in photosynthesis. Also in extended use and in figurative contexts.Common in the 19th cent., but now much less common than the adjective actinic. ΘΚΠ the world > matter > physics > electromagnetic radiation > solar radiation > [noun] > property causing chemical change tithonicity1842 actinism1845 tithonism1855 the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > energy causing chemical changes energy1844 tithonization1844 actinism1845 activism1856 1845 R. Hunt in Rep. Brit. Assoc. Advancem. Sci. 1844 30 By a most careful prismatic analysis of the rays..I have ascertained the relative quantity of the active chemical principle (Actinism). 1849 J. Lindley Elements Bot. (new ed.) 56 Mr. Hunt believes that the germination of seeds in the spring..is dependent upon the variations in the amount of actinism—or chemical influence—of light and of heat in the solar beam. 1883 Cent. Mag. 25 884 Work is poetic..whose quick similitudes have the heat, the light, the actinism, of the day-beam. 1896 N. Amer. Rev. Mar. 375 The common metals, iron and steel..are very impervious to the new actinism, while less useful ones, like silver, brass and aluminum, are much more transparent. 1913 Auk 30 75 The photograph will show a dominant purplish tone, owing to the excessive actinism of the violet and blue rays of ordinary light. 2002 Plant Cell 14 1069/2 (caption) Actinism of the monitoring light contributes to a crystal dark-state spectrum containing a small percentage of photoproduct. †2. The radiation of heat or light (see quot. 1847). Obsolete. rare.Perhaps based on a misapprehension.Apparently only attested in dictionaries or glossaries. ΘΚΠ the world > matter > physics > electromagnetic radiation > heat > [noun] > emission or diffusion irradiation1794 radiance1800 radiation1802 actinism1847 scattering1866 emissivity1880 the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [noun] irradiation1599 eradiation1633 radiature1663 diradiation1706 actinism1847 Cerenkov effect1940 superradiance1957 1847 J. Craig New Universal Dict. Actinism, the radiation of heat or light, or that branch of Philosophy which treats of it. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). < n.1845
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