azimuthn.

/ˈazɪməθ/

Forms: Middle English azimut, azymut, Middle English–1600s azymuth, 1500s azumuth, (1600s azimynth, azimoth), 1500s– azimuth.

Etymology: < French azimut, cognate with Italian azzimutto , Portuguese azimuth , < Arabic as-sumūt , i.e. as = al the + sumūt , plural of samt way, direction, a direction or point of the compass or horizon, and the arc extending from it to the zenith. Compare samt-al-rā's the direction or point over head, whence the term zenith n. and adj. With the form azimynth compare Italian aziminthi (Florio).

1. An arc of the heavens extending from the zenith to the horizon which it cuts at right angles; the quadrant of a great circle of the sphere passing through the zenith and nadir, called an azimuth-circle.

ΘΚΠ

the world > the universe > celestial sphere > circle of celestial sphere > [noun] > great circle > azimuth circle

azimuthc1400

vertical circle1559

zenith line1585

vertical1669

c1400 ( G. Chaucer Treat. Astrolabe (Cambr. Dd.3.53) (1872) i. §19. 11 From this senyth..ther come a maner krokede strikes like to the clawes of a loppe..keruyng ouert[hwart] the Almykanteras. And thise same strikes or diuisiouns ben cleped Azymuthz... Thise Aȝimutz seruen to knowe the costes of the firmament.

1595 J. Davis Seamans Secrets ii. sig. J1^v Circles of Azumuths, or verticall circles, are quarters of great circles, concurring together in the Zenith.

1605 J. Sylvester tr. G. de S. Du Bartas Deuine Weekes & Wks. ii. ii. 490 The Almycantharats, With th' Azimynths.

1651 N. Biggs Matæotechnia Medicinæ Praxeωs ⁋157 Severall azimuths meeting in the Zenith.

1796 C. Hutton Math. & Philos. Dict. (new ed.) I. 178/2 These azimuths are represented..on the globe by the quadrant of altitude.

1874 Moseley's Lect. Astron. (new ed.) ix. 45 If a great circle..be imagined to be drawn from the zenith..to the horizon, through any star..it is called the azimuth circle of that star.

a. The angular distance of any such circle from a given limit, e.g. a meridian. Hence, the true azimuth of a heavenly body is, the arc of the horizon intercepted between the north (or, in the Southern hemisphere, south) point of the horizon and the point where the great circle passing through the observed heavenly body cuts the horizon. Its magnetic azimuth is the arc intercepted between the magnetic meridian and this great circle. azimuth compass: a minutely divided mariner's compass, fitted with vertical sights, used for taking the magnetic azimuth of a heavenly body. azimuth dial: one whose gnomon is perpendicular to the plane of the horizon. azimuth mirror: an instrument placed on the glass cover of a mariner's compass and used for taking azimuths.

ΘΚΠ

the world > the universe > heavenly body > position of heavenly body > [noun] > other

declinationc1400

meridian altitudec1400

angle of position?a1560

zenith distance1588

refraction1603

azimuth1626

amplitude1627

horizontal parallax1665

complement1703

aberration1737

hour-angle1837

intercept1901

1626 J. Smith Accidence Young Sea-men 36 Learne to obserue..the Sunnes Azimuth and Almicanter.

1697 W. Dampier New Voy. around World xix. 531 The Azimuth Compass, an Instrument more peculiar to the Seamen of our Nations.

1762 W. Falconer Shipwreck i. 10 The Pilots now an Azimuth attend.

1834 Nat. Philos. (Libr. Useful Knowl.) III. Astron. 255/1 The true azimuth, compared with the magnetic azimuth, will give the deviation of the compass.

b. in azimuth: in a horizontal circular direction.

ΘΚΠ

the world > space > direction > specific directions > [phrase] > in horizontal circular direction

in azimuth1831

1831 D. Brewster Treat. Optics xiv. 123 If we turn the steel plate round in azimuth.

1879 G. B. Prescott Speaking Telephone (new ed.) 269 The mirror is so mounted as to swing in azimuth.

3. transferred and figurative. Horizontal angle, or direction; point of the compass.

ΘΚΠ

the world > space > direction > [noun] > according to points of the compass

pointc1503

coastage1610

azimuth1667

1667 Sir R. Moray in Philos. Trans. (Royal Soc.) 2 477 Note also, at what Azimuth the Mark stands from the Gun.

1831 D. Brewster Treat. Optics xix. 167 Reflected from the second plate, at the azimuths 90° and 270°.

1860 M. F. Maury Physical Geogr. Sea (ed. 8) iv. §245 Wind gauges..to show the inclination, as well as the Azimuth of the wind.

1867 T. Carlyle Reminisc. (1881) II. 52 How he found his way thither I know not (perhaps in a cab, if quite lost in his azimuth).

This entry has not yet been fully updated (first published 1885; most recently modified version published online December 2020).

单词	azimuth
释义	azimuthn. /ˈazɪməθ/ Forms: Middle English azimut, azymut, Middle English–1600s azymuth, 1500s azumuth, (1600s azimynth, azimoth), 1500s– azimuth. Etymology: < French azimut, cognate with Italian azzimutto , Portuguese azimuth , < Arabic as-sumūt , i.e. as = al the + sumūt , plural of samt way, direction, a direction or point of the compass or horizon, and the arc extending from it to the zenith. Compare samt-al-rā's the direction or point over head, whence the term zenith n. and adj. With the form azimynth compare Italian aziminthi (Florio). 1. An arc of the heavens extending from the zenith to the horizon which it cuts at right angles; the quadrant of a great circle of the sphere passing through the zenith and nadir, called an azimuth-circle. ΘΚΠ the world > the universe > celestial sphere > circle of celestial sphere > [noun] > great circle > azimuth circle azimuthc1400 vertical circle1559 zenith line1585 vertical1669 c1400 ( G. Chaucer Treat. Astrolabe (Cambr. Dd.3.53) (1872) i. §19. 11 From this senyth..ther come a maner krokede strikes like to the clawes of a loppe..keruyng ouert[hwart] the Almykanteras. And thise same strikes or diuisiouns ben cleped Azymuthz... Thise Aȝimutz seruen to knowe the costes of the firmament. 1595 J. Davis Seamans Secrets ii. sig. J1^v Circles of Azumuths, or verticall circles, are quarters of great circles, concurring together in the Zenith. 1605 J. Sylvester tr. G. de S. Du Bartas Deuine Weekes & Wks. ii. ii. 490 The Almycantharats, With th' Azimynths. 1651 N. Biggs Matæotechnia Medicinæ Praxeωs ⁋157 Severall azimuths meeting in the Zenith. 1796 C. Hutton Math. & Philos. Dict. (new ed.) I. 178/2 These azimuths are represented..on the globe by the quadrant of altitude. 1874 Moseley's Lect. Astron. (new ed.) ix. 45 If a great circle..be imagined to be drawn from the zenith..to the horizon, through any star..it is called the azimuth circle of that star. 2. a. The angular distance of any such circle from a given limit, e.g. a meridian. Hence, the true azimuth of a heavenly body is, the arc of the horizon intercepted between the north (or, in the Southern hemisphere, south) point of the horizon and the point where the great circle passing through the observed heavenly body cuts the horizon. Its magnetic azimuth is the arc intercepted between the magnetic meridian and this great circle. azimuth compass: a minutely divided mariner's compass, fitted with vertical sights, used for taking the magnetic azimuth of a heavenly body. azimuth dial: one whose gnomon is perpendicular to the plane of the horizon. azimuth mirror: an instrument placed on the glass cover of a mariner's compass and used for taking azimuths. ΘΚΠ the world > the universe > heavenly body > position of heavenly body > [noun] > other declinationc1400 meridian altitudec1400 angle of position?a1560 zenith distance1588 refraction1603 azimuth1626 amplitude1627 horizontal parallax1665 complement1703 aberration1737 hour-angle1837 intercept1901 1626 J. Smith Accidence Young Sea-men 36 Learne to obserue..the Sunnes Azimuth and Almicanter. 1697 W. Dampier New Voy. around World xix. 531 The Azimuth Compass, an Instrument more peculiar to the Seamen of our Nations. 1762 W. Falconer Shipwreck i. 10 The Pilots now an Azimuth attend. 1834 Nat. Philos. (Libr. Useful Knowl.) III. Astron. 255/1 The true azimuth, compared with the magnetic azimuth, will give the deviation of the compass. b. in azimuth: in a horizontal circular direction. ΘΚΠ the world > space > direction > specific directions > [phrase] > in horizontal circular direction in azimuth1831 1831 D. Brewster Treat. Optics xiv. 123 If we turn the steel plate round in azimuth. 1879 G. B. Prescott Speaking Telephone (new ed.) 269 The mirror is so mounted as to swing in azimuth. 3. transferred and figurative. Horizontal angle, or direction; point of the compass. ΘΚΠ the world > space > direction > [noun] > according to points of the compass pointc1503 coastage1610 azimuth1667 1667 Sir R. Moray in Philos. Trans. (Royal Soc.) 2 477 Note also, at what Azimuth the Mark stands from the Gun. 1831 D. Brewster Treat. Optics xix. 167 Reflected from the second plate, at the azimuths 90° and 270°. 1860 M. F. Maury Physical Geogr. Sea (ed. 8) iv. §245 Wind gauges..to show the inclination, as well as the Azimuth of the wind. 1867 T. Carlyle Reminisc. (1881) II. 52 How he found his way thither I know not (perhaps in a cab, if quite lost in his azimuth). This entry has not yet been fully updated (first published 1885; most recently modified version published online December 2020). < n.c1400
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