Check out "horizontal cylindric segment" in Wolfram Alpha Online. That is the correct term for the solid you are looking for.
Wolfram Alpha - "The solid cut from a horizontal cylinder of length L and radius R by a single plane oriented parallel to the cylinder's axis of symmetry (i.e., a portion of a horizontal cylindrical tank which is partially filled with fluid) is called a horizontal cylindrical segment."
A cylinder? A cylinder is still a cylinder regardless of how long it is.
Another cylinder
The radius of a cylinder is half the thickness of its circular cross section.
It is half the thickness (diameter) of the circular cross-section of the cylinder.
A cylinder is a 3-dimensional object. A pyrimad is a typographic error!
If the cylinder is cut in half along the side it is still a cylinder. If the cylinder is cut in half along one of the circular faces it is a horizontal cylindrical segment, which would look like a pig trough not hollowed out.
A cylinder? A cylinder is still a cylinder regardless of how long it is.
Another cylinder
A cylindania.
cylindania
A cylindania.
The radius of a cylinder is half the thickness of its circular cross section.
It is half the thickness (diameter) of the circular cross-section of the cylinder.
If you have a physical cylinder to measure, measure the "width" of the circle that is the cross section of the cylinder. That is the diameter, Half the diameter is the radius.
You call that an oil can or a barrel.
A cylinder is a 3-dimensional object. A pyrimad is a typographic error!
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