| 单词 | astronomer's ring |
| 释义 | > as lemmasastronomer's ring astronomer's ring n. see ring n.1 3e. astronomer's ring e. Astronomy. An instrument for measuring the altitude of the sun, consisting of a circle mounted in the plane of the meridian; an armillary circle (cf. circle n. 13a). More fully astronomer's ring, astronomical ring. Now historical and rare. ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > [noun] > astrolabe > astronomer's ring ring1551 mariner's ring1574 1551 R. Record Pathway to Knowl. ii. Pref. sig. a.iij The arte of measuryng by the astronomers staffe, and by the astronomers ryng. 1594 T. Blundeville Exercises vii. xxxvi. 712 Seeke by your Astronomicall Ring..to know what houre it is. 1728 E. Chambers Cycl. Ring, is also an Instrument used in Navigation, for taking the Altitudes of the Sun, &c. 1784 R. Dunthorne et al. Long's Astron. (new ed.) II. v. ix. 699 He [sc. Gemma Frisius] invented and described an instrument, which he called an astronomical ring. 1987 J. A. Bennett Divided Circle i. 12 His meridian armillary or ring..was designed for measuring the altitude of the Sun when due South. < as lemmas |
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