A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line.

A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line.
Contrapposto, (Italian: “opposite”), in the visual arts, a sculptural scheme, originated by the ancient Greeks, in which the standing human figure is poised such that the weight rests on one leg (called the engaged leg), freeing the other leg, which is bent at the knee. With the weight shift, the hips, shoulders, and head tilt, […]
Conventional, conformist, which corresponds to established and stable standards of aesthetics born of imitation (contrary: avant-garde, original).
Abstraction : What opposes figurative representations. The result is expressive forms and not representative forms. Geometric abstraction uses forms of geometric appearance.