It depends on which alphabet you are talking about. The Latin alphabet for English has 11 upper case curved letters (BCDGJOPQRSU) and 18 lower case curved letters (abcdefghjmnopqrstu)
It's just called curved glass.
The curved bones of the chest is called ribs
ogee is curved molding
It called the curved surface area. There is no special name for it.
It called the curved surface area. There is no special name for it.
Lens.
A curved path followed by a projectile is called a trajectory. This is the path that an object takes when it is thrown or launched into the air.
It is called a "meander". They are the curved parts in a stream.
The curved part of a saddle is called the "seat."
An arch
Vault