right-angledadj.
/ˈrʌɪtˌaŋɡld/, U.S. /ˈraɪdˌæŋɡ(ə)ld/, /ˌraɪdˈæŋɡ(ə)ld/ 1.
a. Having or forming one or more right angles; rectangular. Also figurative: honest, straightforward (rare); cf. square adj. 10c.
ΘΚΠ
the world > space > shape > angularity > [adjective] > constituting an angle > right > with parts or lines right-angled to each other
right-cornered1551
right-angled?a1560
rectangled1570
rectanguled1636
rectangular1703
right-angular1704
rectangulate1852
the world > relative properties > number > geometry > curve > [adjective] > of conic section > hyperbolical > of or relating to
hyperbolic1704
right-angled1749
?a1560 L. Digges Geom. Pract.: Pantometria (1571) ii. xii. sig. N ij v Rightangled Parallelogrammes.
1651 C. Brookes Sphær. Triangles 4 Any right-angled or quadrantal triangle proposed.
1749 B. Franklin Let. 29 July in Exper. Electricity (1751) 68 Bring this on your plate..in such a manner as that the right-angled part may be first raised.
1791 T. Paine Rights of Man i. 81 The graceful pride of truth knows no extremes, and preserves, in every latitude of life, the right-angled character of man.
1831 D. Brewster Treat. Optics xxix. 244 The apophyllite from Faroe generally crystallises in right-angled square prisms.
1883 Cent. Mag. Oct. 818/2 Long lines of olive orchard, and right-angled walls of eucalyptus trees shutting in wheat-fields.
1920 F. S. Hoyt & H. E. Peet Everyday Arithm. (rev. ed.) v. vii. 106 A triangle with one of its angles a right angle is called a right-angled triangle.
1995 Edge Nov. 66/2 Tip-toe around the track trying not to smash into the barriers on the right-angled corners.
b. Moving or lying at right angles to something.
ΘΚΠ
the world > space > relative position > position at right angles to something > [adjective]
perpendicularc1475
square?a1560
direct1563
rectangular1646
upright1678
orthogonal1694
normal1704
right-angled1802
cathetal1874
1802 Port Folio 30 Jan. 32/2 They are silent, Save when they reach the fence beneath the shade, Dragging the plough right-angled to the horse.
a1817 T. Dwight Trav. New-Eng. & N.-Y. (1821) II. 218 The streets are both parallel, and right-angled to the river.
1904 R. I. Lynch Bk. Iris 199/2 Dentate,..with sharpish teeth right-angled to the margin.
1956 Pop. Sci. Nov. 42/1 This wheel runs against a track right-angled to the rails and prevents sway.
1991 ‘E. McBain’ Widows iv. 81 The windows—one over the sink, the other on the wall right-angled to the sofa—were wide open.
2. Characterized by right angles.
ΘΚΠ
the world > space > shape > angularity > [adjective] > constituting an angle > right > characterized by right angles
right-angled1780
1780 West's Guide to Lakes (ed. 2) 62 The views from this..highest of all, when the prospect is furnished with some useful (right-angled if you will) erection of brick or stone.
1833 J. L. Motley Let. Sept. in Corr. (1889) I. ii. 28 I am settled in this most right-angled of cities.
1891 C. W. M. Moullin Surg. iii. vi. 365 Tonic shortening of the gastrocnemius (the so-called right-angled contraction of the tendo Achillis).
1963 S. Ashton-Warner Teacher 76 The right-angled leafing arrangements and the pairs of leaves set exactly opposite each other as in the Koromiko.
2000 M. Gladwell Tipping Point 207 Gordon is a striking woman..who lives in a right-angled, shag-rugged, white-stuccoed modernist masterpiece in the Hollywood Hills.
Compounds
right angled hyperbola n. Mathematics = rectangular hyperbola n. at rectangular adj. Compounds 2.
ΚΠ
1720 J. Raphson & S. Cunn tr. I. Newton Universal Arithmetick 140 Any diameter, as AB, of a right-angled hyperbola, being drawn [etc.].
1814 J. F. W. Herschel in Philos. Trans. (Royal Soc.) 104 464 If AM be a right angled hyperbola.
1896 W. R. Whitney tr. M. Le Blanc Elements Electro-chem. vi. 136 We obtain a curve as shown, which is a right-angled hyperbola.
2003 W. M. Oxbury tr. S. Mukai Introd. Invariants & Moduli i. 7 (in figure) Right angled hyperbola.
right-angled trigonometry n. Mathematics now rare trigonometry that deals with right angles and right-angled figures.
ΘΚΠ
the world > relative properties > number > geometry > [noun] > branches of > trigonometry
trigonometry1614
right-angled trigonometry?a1729
?a1729 J. Ward Posthumous Wks. (1730) i. iv. 88 In the Solution of the preceding six Cases of right-angled Trigonometry, it is to be observ'd, that the Proportions might have been varied.
1828 Moore's Pract. Navigator (ed. 20) 38 Solution of the Six Cases in Right-angled Trigonometry.
2003 Math. Gaz. 87 256 Pythagoras' theorem; right-angled trigonometry; linear factorisation [etc.].
Derivatives
ˌright-ˈangledness n. rare the quality of having or being a right angle or right angles.
ΘΚΠ
the world > space > shape > angularity > [noun] > angle or corner > right angle > quality of having right angles
rectangularity1645
right-angledness1829
1829 N. Amer. Rev. July 115 If we can perceive equilateralness and right-angledness, why may not we perceive triangleness?
1891 Athenæum 15 Aug. 215/1 The surviving Etruscan L's do not on the whole suggest right~angled-ness.
1922 E. Hungerford Our Railroads To-morrow vii. 127 The tendency toward right-angledness of the salary line between the top class of railroad personnel and the bottom.
2005 Globe & Mail (Canada) (Nexis) 21 Jan. g2 A wide external stair rising between the fifth level and the roof..provides a good moment of counterpoint to the general right-angledness of the centre.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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adj.?a1560