mysteriumn.

Brit.

/mᵻˈstɪərɪəm/, U.S.

/məˈstɪriəm/

Origin: Either (i) formed within English, by derivation. Or (ii) a borrowing from Latin. Etymons: -ium suffix; Latin mystērium.

Etymology: Either < myster- (in mysterious adj.) + -ium suffix, or < classical Latin mystērium mystery n.¹

Astronomy. Now historical.

A mysterious element; spec. a hypothetical substance to which a galactic radio emission at 1665 megahertz was formerly attributed, later identified as an exceptionally strong component of a set of four spectral lines emitted by hydroxyl radicals in interstellar space.

ΘΚΠ

the world > the universe > diffused matter > [noun] > mysterium

mysterium1965

1965 H. Weaver et al. in Nature 2 Oct. 30/1 There is no known identification of the strong emission line at 1,665 Mc/s... We shall speak of this unidentified line as arising from ‘mysterium’.

1965 H. Weaver et al. in Nature 2 Oct. 30/2 Our observations indicate that ‘mysterium’ is found in strong H II regions, but not in all strong H II regions.

1967 Science 25 Aug. 885/1 Mysterium has now been identified as OH.

1974 G. L. Verschuur Invisible Universe ix. 77 How do we now know that the mysterium signals are in fact OH lines?

1995 Sci. Amer. Feb. 52/1 They dubbed the emitting substance ‘mysterium’, for lack of an obvious explanation.

This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022).

单词	mysterium
释义	mysteriumn. Brit. /mᵻˈstɪərɪəm/, U.S. /məˈstɪriəm/ Origin: Either (i) formed within English, by derivation. Or (ii) a borrowing from Latin. Etymons: -ium suffix; Latin mystērium. Etymology: Either < myster- (in mysterious adj.) + -ium suffix, or < classical Latin mystērium mystery n.¹ Astronomy. Now historical. A mysterious element; spec. a hypothetical substance to which a galactic radio emission at 1665 megahertz was formerly attributed, later identified as an exceptionally strong component of a set of four spectral lines emitted by hydroxyl radicals in interstellar space. ΘΚΠ the world > the universe > diffused matter > [noun] > mysterium mysterium1965 1965 H. Weaver et al. in Nature 2 Oct. 30/1 There is no known identification of the strong emission line at 1,665 Mc/s... We shall speak of this unidentified line as arising from ‘mysterium’. 1965 H. Weaver et al. in Nature 2 Oct. 30/2 Our observations indicate that ‘mysterium’ is found in strong H II regions, but not in all strong H II regions. 1967 Science 25 Aug. 885/1 Mysterium has now been identified as OH. 1974 G. L. Verschuur Invisible Universe ix. 77 How do we now know that the mysterium signals are in fact OH lines? 1995 Sci. Amer. Feb. 52/1 They dubbed the emitting substance ‘mysterium’, for lack of an obvious explanation. This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022). < n.1965
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