| 单词 | guard-ring |
| 释义 | > as lemmasguard-ring guard-ring n. (a) a finger ring worn to keep another from slipping off; a keeper; (b) (see quot. 1893 at sense 7b). ΘΚΠ the mind > attention and judgement > beautification > types of ornamentation > jewellery > ring > [noun] > guard-ring or keeper guard-ring1817 keeper1851 the world > matter > physics > electromagnetic radiation > electricity > [noun] > measurement of > instrument for > part of guard-ring1817 guard-plate1873 guard tube1892 1817 M. Edgeworth Harrington & Ormond I. xvii. 462 She never wore Sir Josseline's ring, without putting on..another..which she called her guard ring, a ring which being tighter than Sir Josseline's, kept it safe on her finger. 1873 J. C. Maxwell Treat. Electr. & Magn. §201 A plane disk..surrounded by a large plane plate called a Guard-ring with a circular aperture..concentric with the disk. 1892 T. O'C. Sloane Standard Electr. Dict. (1893) 282 Guard Ring, an annular horizontal surface surrounding the balanced disc in the absolute electrometer. < as lemmas |
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