Bone depressions
A sharp projection from the surface of a bone is called a process. Bones can have different types of processes, such as a spinous process, which is a sharp, pointed projection; or a tuberosity, which is a large, rounded projection. Processes serve as attachment points for ligaments and tendons.
A meatus is an opening; therefor, it's a depression, not a projection.
Depressions are indentations or hollowed-out areas on bones, while processes are bony projections or outgrowths that serve as attachment sites for muscles, ligaments, or tendons. Depressions can accommodate other bone structures or provide passageways for blood vessels and nerves, while processes play a role in joint formation and movement.
Projection towers on castles are called a Buttress.
The displacement of these two foot bones causes a projection of bone on the inside portion of the forefoot.
If you have a projection on your skull, something that might relate is a swelling of the tissues of the skull due to a blow from a dull object. The projection on the Occipital Bone is called the Inion.
It is called a talon
A projection
The map projection that transfers points from a sphere to a cylinder is called a cylindrical projection. Examples include the Mercator and Miller cylindrical projections.
Parallel projection does not produces realistic views whereas perspective projection produces realistic viewin parallel projection lines of projection are parallel whereas in perspective projection lines are not parallel and the point where these lines meets is called ceter of projection in case of perspective projection
Projection
A projection