Noah Webster
Roundness
ROUND'NESS, noun
1. The quality of being round, circular, spherical, globular or cylindrical; circularity; sphericity; cylindrical form; rotundity; as the roundness of the globe, of the orb of the sun, of a ball, of a bowl, etc.
2. Fullness; smoothness of flow; as the roundness of a period.
3. Openness; plainness; boldness; positiveness; as the roundness of an assertion.