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ruled surface

noun

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


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Word History and Origins

Origin of ruled surface1

First recorded in 1860–65
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Example Sentences

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

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

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

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

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

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rulerule joint