Torus
The S-shaped architectural moulding is commonly referred to as "ogee" moulding. It features a concave curve that transitions into a convex curve, creating a distinctive S-shape. Ogee moulding is often used in decorative trim, cornices, and cabinetry to add elegance and detail to interior and exterior designs.
A convex moulding on a cornice is called a TORUS if it is semi-circular or an OVOLO if its not. When combined with a concave moulding it is called a CYMA where the concave is at the top or a OGEE where the convex is at the top.
ovolo
cyma
Convex mirror form only one image(virtual) because it diverges light rays(beam).
ovolo (from the Italian for egg uovo
The S-shaped architectural moulding is commonly referred to as "ogee" moulding. It features a concave curve that transitions into a convex curve, creating a distinctive S-shape. Ogee moulding is often used in decorative trim, cornices, and cabinetry to add elegance and detail to interior and exterior designs.
A convex moulding on a cornice is called a TORUS if it is semi-circular or an OVOLO if its not. When combined with a concave moulding it is called a CYMA where the concave is at the top or a OGEE where the convex is at the top.
ovolo
Cyma
The architectural term you are looking for is "ovolo." An ovolo is a classical molding profile that features a convex curve on the top and a concave one on the bottom. It is commonly used to soften the sharp edges of a door or window frame.
A convex curve in the shaft of a column
The architectural term you are referring to is an "ogee." It describes a type of molding that has a profile featuring a concave curve flowing into a convex curve.
cyma
Lordosis an anteriorly convex curvature of the vertebral column; the normal lordoses of the cervical and lumbar regions are secondary curvatures of the vertebral column, acquired postnatally
The thoracic and sacral regions of the vertebral column typically retain a posteriorly convex curvature in the adult. The thoracic region curves outward due to the shape of the ribs attaching to the spine, while the sacral region naturally curves to accommodate the weight of the upper body.
Meniscus -- The concave or convex surface of a column of liquid in a hydrometer.