the very definition YOU gave said "or seemingly flat"<quoted text>
Let's look at your link definition:
In geometry, a disk (also spelled disc) is the region in a plane bounded by a circle.
plane(geometry) definition - a plane is a flat, two-dimensional surface.
A circle is two dimensional being it has the dimensions of height and width but not depth, therefore is two dimensional.
None of the above define a 3 dimensional sphere, which has height and width and depth. Not even from your definition link of disk.
So let's look at that again. A disc or disk is two dimensional like a circle. Nice try though. May I suggest you take a geometry class and maybe learn something new?
give it up, dude. you proved yourself wrong....