A sphere.
The description given fits that of a cylinder.
Cylinder
Cylinder
a sphere
its a lens...1 curved edge = a circle, 1 flat surface = back, 1 curved surface = front. (these are used in some battery-less flashlights, as an example.)
cylinder
a giant or small cone
well.....a cone or a cylinder??
A sphere sliced by a plane, eg a hemisphere.
Prism
A sphere sliced by a plane; or a cone.
1 because all of the shape is curved except for the flat surface on the bottom