Definition:Cylindrical Surface
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Definition
A cylindrical surface is a surface formed by all the straight lines parallel to a given straight line $L$ passing through a given curve $C$ which is not in the same plane as $L$.
Directrix
The directrix of a cylindrical surface $S$ is the curve $C$ through which pass all the parallel straight lines forming $S$.
Generatrix
Each of the parallel straight lines forming a cylindrical surface $S$ which pass through the directrix of $S$ is called a generatrix of $S$.
Also see
- Results about cylindrical surfaces can be found here.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): cylindrical surface
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): cylindrical surface