adiactinicadj.

Brit.

/(ˌ)eɪdʌɪakˈtɪnɪk/, U.S.

/ˌeɪˌdaɪækˈtɪnɪk/

Origin: Formed within English, by derivation. Etymons: a- prefix⁶, diactinic adj.

Etymology: < a- prefix⁶ + diactinic adj. Compare actinic adj.

Chiefly Chemistry and Photography. Now rare.

Of a substance: not diactinic, opaque to actinic light.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [adjective] > transmitting rays > not

adiactinic1845

1845 R. Hunt in Mem. & Proc. Chem. Soc. London 1843–5 2 312 It will be convenient to speak of media which obstruct the passage of actinism, like the quadri-sulphuret of lime and the solution of the bichromate of potash, as Adiactinic.

1880 19th Cent. Mar. 529 Those substances which are chemically transparent are said to be diactinic; while those which are chemically opaque are, of course, adiactinic.

1904 Camera Oct. 395/2 There is no certainty as to what color of adiactinic medium may not be come across on entering a strange dark-room.

This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021).

单词	adiactinic
释义	adiactinicadj. Brit. /(ˌ)eɪdʌɪakˈtɪnɪk/, U.S. /ˌeɪˌdaɪækˈtɪnɪk/ Origin: Formed within English, by derivation. Etymons: a- prefix⁶, diactinic adj. Etymology: < a- prefix⁶ + diactinic adj. Compare actinic adj. Chiefly Chemistry and Photography. Now rare. Of a substance: not diactinic, opaque to actinic light. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [adjective] > transmitting rays > not adiactinic1845 1845 R. Hunt in Mem. & Proc. Chem. Soc. London 1843–5 2 312 It will be convenient to speak of media which obstruct the passage of actinism, like the quadri-sulphuret of lime and the solution of the bichromate of potash, as Adiactinic. 1880 19th Cent. Mar. 529 Those substances which are chemically transparent are said to be diactinic; while those which are chemically opaque are, of course, adiactinic. 1904 Camera Oct. 395/2 There is no certainty as to what color of adiactinic medium may not be come across on entering a strange dark-room. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021). < adj.1845
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