ruled surface

noun

, Geometry.

1. a surface that can be generated by a straight line, as a cylinder or cone.

Word History and Origins

Origin of ruled surface¹

First recorded in 1860–65

Example Sentences

In the general case of a singly infinite system of lines, the locus is a ruled surface (or regulus).

From Project Gutenberg

The degree of a ruled surface qua line geometry is the number of its generating lines contained in a linear complex.

From Project Gutenberg

Since a ruled surface contains only ∞ elements, this theory is practically the same as that of curves.

From Project Gutenberg

We have occasionally met with leaves having a lined or ruled surface, giving most beautiful diffraction colours.

From Project Gutenberg

The ruled surface is, moreover, concave, and hence brings the spectrum to a focus without a telescope.

From Project Gutenberg