conocuneusn.
/kəʊnəʊˈkjuːniːəs/ Geometry.
A surface generated by a straight line which constantly intersects a fixed straight line at right angles, and also constantly passes through the circumference of a fixed circle; i.e. a figure with a circular base like a cone, but having instead of an apex a ridge or edge like a wedge. First treated of by Prof. J. Wallis of Oxford in 1662. In his definition the name is applied to one quarter of the whole solid, formed by two sections, parallel and at right angles, respectively, to the edge, and having thus one fourth of the curved surface, and three plane surfaces, one a quadrant of the circular base.
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the world > relative properties > number > geometry > surface > [noun] > generated by a line
conocuneus1662
conoid1862
torse1863
1662 J. Wallis Lett. to Sir R. Murray Apr. 7 Solidum sic terminatum vocamus Conocuneum.
1684 J. Wallis Lett. to Sir R. Murray (transl.) I thought fit to give it the name of Cono-Cuneus, as having the base of a Cone, and the vertex of a Cuneus.
1852 B. Price Treat. Infinitesimal Calculus I. 474 Perpendicular to the axis..which surface is known by the name of the Cono-Cuneus of Wallis.
1862 G. Salmon Treat. Analytic Geom. Three Dimensions §384 Ex. 1 The equation of the right conoid passing through the axis of z and through a plane curve..Wallis's cono-cuneus is when the fixed curve is a circle.
This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2018).
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n.1662