Definitions for "Undercling"
A hand hold which is "upside down" and is used by pulling up against it instead of pulling down.
hold that is usually only worth using from above by grasping its underside. Normally requires some form of lieback to use and can be quite difficult.
A climbing move in which counter-pressure is applied to the underside of a rock flake or slab by pulling up on it, while pushing down on the feet.