Technically, any ceiling with a pitch of 2/12 or more. Many styles, e.g., barrel, box or channel, dome, and groin. NB: Attend closely to insulation codes and ventilation mechanics.
A ceiling that angles upward on one or both sides to create volume in the room.
A ceiling formed in any variety of curved shape, which arches above the floor within a home.
An elongated half-cylinder that arches above the floor.
An elongated half-cylinder shaped arched ceiling, i.e. a roof or ceiling shaped as an arch.