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right-angled, a.
[f. right a. 3 + angled a.]
1. a. Of geometrical figures, etc.: Containing or forming a right angle or right angles; rectangular.
1571Digges Pantom. i. B iij, A Rightangled Triangle is suche a one as hath one Righte Angle. Ibid. ii. xii. N ij b, Rightangled Parallelogrammes. 1608Topsell Serpents (1658) 785 Some are made with all sides equall, but yet not right angled or cornered like a quarry of Glasse. 1651C. Brookes Sphær. Triangles 4 Any right-angled or quadrantal triangle proposed. 1750Franklin Opin. Wks. 1887 II. 189 Bring this on your plate..in such a manner as that the right-angled part may be first raised. 1772C. Hutton Bridges 77 It is least of all in the triangle..when right⁓angled. 1831Brewster Optics xxix. 244 The apophyllite from Faroe generally crystallises in right-angled square prisms. 1857Thoreau Maine W. (1894) 85 The remains of a gray rabbit, skin, bones, and mould closely fitting the right⁓angled corner of one side [of the box]. 1883Cent. Mag. Oct. 818/2 Long lines of olive orchard, and right-angled walls of eucalyptus trees shutting in wheat-fields.
transf.1791T. Paine Rights of Man i. (ed. 2) 85 The graceful pride of truth knows no extremes, and preserves, in every latitude of life, the right-angled character of man.
b. Of a hyperbola: (see rectangular a. 4).
1743Emerson Fluxions 61 The right angled Hyperbola, whose semi-transverse is R.
c. Lying at right angles to something.
a1817T. Dwight Trav. New Eng., etc. (1821) II. 218 The streets are both parallel, and right-angled to the river.
2. Characterized by right angles.
1833Motley Corr. (1889) I. ii. 28, I am settled in this most right-angled of cities. 1834Tait's Mag. 381/1 A letter of his written with every character, sturdy, firm and right⁓angled. 1891Moullin Surg. iii. vi. 365 Tonic shortening of the gastrocnemius (the so-called right-angled contraction of the tendo Achillis).
3. That deals with right angles. rare—1.
1828Moore Pract. Navig. 38 Solution of the Six Cases in Right-angled Trigonometry.
So right-ˈangle v. trans., to cross or cut at right angles; right-ˈangledness, rectangularity.
a1847Eliza Cook My Murray Plaid ii, The lines of purple deeply spread, Right-angled with the stripes of red. 1895Harper's Mag. Feb. 344/1 This crossing right-angled a deep railroad. 1891Athenæum 15 Aug. 215/1 The surviving Etruscan L's do not on the whole suggest right⁓angled-ness. |