Any hooked or incurved appendage, e.g. a tendril of a plant, one of the hooks on the fruit of the burdock, etc.; the curved or hooked part of…

concrete. A curved or bent part; a bending, bend, or flexure; a joint. Obsolete exc. dialect.

The place or part where such curving occurs; a curve, angle, corner; a bend; the spring of an arch or vault.

A rounded edge or surface; a curved part or outline; (also) curvature.

A curved part, a bend, a crook. Obsolete.

concrete. A thing of bent shape; the bent part of anything, e.g. of a river, a road; a curve or crook.