† parathermicadj.

Origin: Formed within English, by derivation. Etymons: para- prefix¹, thermic adj.

Etymology: < para- prefix¹ + thermic adj. (see quot. 1843). Compare Hellenistic Greek παράθερμος overhot. N.E.D. (1904) gives the pronunciation as (pærăþə̄·ɹmik) /pærəˈθɜːmɪk/.

Physics. Obsolete.

In Sir John Herschel's terminology: designating supposed invisible radiation which is close to orange and red light in the spectrum, is emitted by bodies below red heat, and is able to decolorize certain vegetable dyes.

ΚΠ

1843 Sir J. Herschel in Philos. Trans. (Royal Soc.) 133 5 Certain rays, which..accompany in the spectrum the red and orange rays, and are also copiously emitted by heated bodies short of redness... If the restriction to these rays of the term thermic as distinct from calorific be not..a sufficient distinction, I would propose the term parathermic rays to designate them.

1871 A. Ure Dict. Arts 14 A green glass stained with oxide of copper, which effectually excludes the injurious parathermic rays, while it admits the other solar rays.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online June 2018).

单词	parathermic
释义	† parathermicadj. Origin: Formed within English, by derivation. Etymons: para- prefix¹, thermic adj. Etymology: < para- prefix¹ + thermic adj. (see quot. 1843). Compare Hellenistic Greek παράθερμος overhot. N.E.D. (1904) gives the pronunciation as (pærăþə̄·ɹmik) /pærəˈθɜːmɪk/. Physics. Obsolete. In Sir John Herschel's terminology: designating supposed invisible radiation which is close to orange and red light in the spectrum, is emitted by bodies below red heat, and is able to decolorize certain vegetable dyes. ΚΠ 1843 Sir J. Herschel in Philos. Trans. (Royal Soc.) 133 5 Certain rays, which..accompany in the spectrum the red and orange rays, and are also copiously emitted by heated bodies short of redness... If the restriction to these rays of the term thermic as distinct from calorific be not..a sufficient distinction, I would propose the term parathermic rays to designate them. 1871 A. Ure Dict. Arts 14 A green glass stained with oxide of copper, which effectually excludes the injurious parathermic rays, while it admits the other solar rays. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online June 2018). < adj.1843
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