| Noun | 1. | symmetricalness - (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or planespatial property, spatiality - any property relating to or occupying space geometrical regularity, regularity - a property of polygons: the property of having equal sides and equal angles bilateral symmetry, bilateralism, bilaterality - the property of being symmetrical about a vertical plane radial symmetry - the property of symmetry about an axis; "the starfish illustrates radial symmetry" math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement |