horographn.
/ˈhɒrəɡrɑːf//ˈhɒrəɡraf/ Mathematics.
(See quot. 1879.)
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the world > relative properties > number > geometry > curve > [noun] > other
quadratrix1656
section1665
family1705
semiparabola1728
tractrix1728
witcha1760
tractory1820
sinusoid1823
tractatrix1828
indicatrix1841
hodograph1847
tetrazomal1867
space curve1875
horograph1879
hypercycle1889
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unknot1971
fractal1975
analemma1978
1879 W. Thomson & P. G. Tait Treat. Nat. Philos. (new ed.) I: Pt. i. §136 The curvatura integra of any given portion of a curved surface, is the area enclosed on a spherical surface of unit radius by a straight line drawn from its centre, parallel to a normal to the surface, the normal being carried round the boundary of the given portion. The curve thus traced on the sphere is called the Horograph of the given portion of curved surface.
This entry has not yet been fully updated (first published 1899; most recently modified version published online December 2018).
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n.1879