equiangularadj.
/iːkwɪˈaŋɡjʊlə/ Geometry.
Having equal angles.
a. Having all its angles equal.
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the world > relative properties > number > geometry > shape or figure > [adjective] > having specific property > having angles > having equal angles
equiangle?a1560
ordinate1590
equiangled1660
equiangular1660
isogonal1878
1660 tr. I. Barrow Euclide's Elements i. 4 An Equiangular, or equall-angled, figure is that whereof all the angles are equall.
1721–1800 in N. Bailey Universal Etymol. Eng. Dict.
1756 Simpson Euclid A circle may be inscribed in a given equilateral and equiangular quindecagon.
1854 S. P. Woodward Man. Mollusca ii. 223 Beak prominent, area equiangular.
b. Having angles respectively equal with those of another figure, or making equal angles with a line. equiangular spiral (see quot. 1884).
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1786 Philos. Trans. (Royal Soc.) 76 21 The method employed to make the threads of the screw equiangular with the axis.
1840 D. Lardner Treat. Geom. 119 Mutually equiangular, and..therefore similar.
1884 B. Williamson Elem. Treat. Differential Calculus (ed. 5) xii. 223 In the logarithmic spiral..the angle between the radius vector and the tangent is constant. On account of this property the curve is also called the equiangular spiral.
This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2018).
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adj.1660