Rounded Corners. The shape of a rectangular plaquette or plate with two or four corners trimmed with a curve instead of square corners; each round corner is an arc one-fourth of a circle. The shape is symbolic of portability; it is easier to carry than an item with square corners (as if it prevented dog-eared corners from being carried about). If all four corners are rounded the shape is called pillow shaped.
excerpted with permission from
For Artists, Makers, Collectors and Curators
COMPILED AND WRITTEN BY D. WAYNE JOHNSON
Roger W. Burdette, Editor