"Bumps" on bones, spherical or not, are generally referred to with the term "process".
The top part of a tornado is called "the top"
Any view of a sphere will be a circle.
The top part of a shoe is called the upper
There are three types of bones within the arm. The large bone is the humerus and is in the upper part of the arm. The radius is part of the forearm and are smaller bones. The ulna is another part of a bone in the forearm.
The top part of a fraction is the numerator; the bottom part is the denominator.
The maxilla is top part of jaw, mandible is lower part of jaw.
A bubble is a sphere. There is no top
Denominator. The top part is called the numerator.
a sphere is like a ball or the top of a cup sometimes
The top part of a stalk would be the terminal bud or leaf.
circle
the inside part of most bones. an example in the cranium (skull), we have spongy bone in the middle and compact bone on top and bottom.