# Ceelinder

(Reguidit frae Cylinder (geometry))
A richt circular ceelinder wi radius r an hicht h.

A ceelinder (frae Greek κύλινδρος – kulindros, "roller, tumbler"[1]) is ane o the maist basic curvilinear geometric shapes, the surface furmed bi the pynts at a fixed distance frae a gien line segment, the axis o the ceelinder. The solit enclosed bi this surface an bi twa planes perpendicular tae the axis is an aa cried a ceelinder. The surface aurie an the vollum o a ceelinder hae been kent syne deep antiquity.

In differential geometry, a ceelinder is defined mair broadly as ony ruled surface spanned bi a ane-parameter faimily o parallel lines. A ceelinder whase cross section is an ellipse, parabola, or hyperbola is cried an elliptic ceelinder, parabolic ceelinder, or hyperbolic ceelinder respectively.

The open ceelinder is topologically equivalent tae baith the open annulus an the punctured plane.

## References

1. κύλινδρος, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus