| 释义 |
▪ I. quadrantal, a.1|kwəˈdræntəl|
[ad. L. quadrantālis: see quadrant n.1 and -al1.]
a. Having the shape of, consisting of, connected with, a quadrant or quarter-circle; esp. quadrantal arc († quadrantal arch).
1678Hobbes Decam. ad. fin., Wks. 1845 VII. 180 A straight line equal to the quadrantal arc BLD. 1703T. N. City & C. Purchaser 14 A Quadrantal Casement, rising from its Plain. 1797Hellins in Phil. Trans. LXXXVIII. 529 The length of a quadrantal arch of the circle. 1867G. Barry Sir C. Barry iv. 116 The central building with quadrantal corridors. 1871B. Stewart Heat (ed. 2) §71 A quadrantal arc of a meridian on the earth's surface. 1914Trans. Ophthalm. Soc. XXXIV. 209 Uncomplicated quadrantal unrecognised hemianopsia. 1918Arch. Ophthalm. XLVII. 126 Early homonymous upper quadrantal defects in Stage I.
b. quadrantal deviation, quadrantal error, quadrantal triangle (see quots.).
1706Phillips (ed. Kersey), Quadrantal Triangle, a Spherick Triangle, that has at least a Quadrant for one of its Sides, and one Angle Right. 1788Herschel in Phil. Trans. LXXVIII. 374 We may resolve the quadrantal triangle q c n. 1857Whewell Hist. Induct. Sc. (ed. 3) III. 528 The magnetic effect of the iron in a ship may be regarded as producing two kinds of deviation [of a ship's compass]..a ‘polar-magnet deviation’,..and a quadrantal deviation, which changes from positive to negative as the keel turns from quadrant to quadrant. 1865Q. Rev. 358 The quadrantal error which depends only on the position of the horizontal soft iron of the ship.
▪ II. † quaˈdrantal, a.2 Obs. rare.
[f. quadrant n.2 + -al1.]
a. Square; having a square base.
b. Astron. = quadrant a. 1 b.
1665J. Gadbury Lond. Deliv. Predicted i. 4 The Conjunctional, Opposite, or Quadrantal Rays of Jupiter. 1690Leybourn Curs. Math. 317 Let ABCDE be a Quadrantal Pyramis, (for a Pyramis is denominated from the number of the equal Sides of the Base thereof, as here four..).
▪ III. † quaˈdrantal, a.3 Obs. rare—0.
[ad. L. quadrantāl-is of a quarter-foot, f. quadrant- quadrant n.1]
(See quot.)
1656Blount Glossogr., Quadrantal..used Adjectively..four fingers thick, or three inches. |