ROUNDNESS
plumpness, embonpoint, roundness
(noun) the bodily property of being well rounded
roundness
(noun) the property possessed by a line or surface that is curved and not angular
roundness
(noun) the quality of being round numbers; “he gave us the results in round numbers, but their roundness didn’t affect the point he was making”
roundness, rotundity
(noun) the fullness of a tone of voice; “there is a musky roundness to his wordiness”
Source: WordNet® 3.1
Etymology
Noun
roundness (usually uncountable, plural roundnesses)
The quality of being round.
Source: Wiktionary
Round"ness, n.
1. The quality or state of being round in shape; as, the roundness of
the globe, of the orb of the sun, of a ball, of a bowl, a column,
etc.
2. Fullness; smoothness of flow; as, the roundness of a period; the
roundness of a note; roundness of tone.
3. Openess; plainess; boldness; positiveness; as, the roundness of an
assertion.
Syn.
– Circularity; sphericity; globosity; globularity; globularness;
orbicularness; cylindricity; fullness; plumpness; rotundity.
Source: Webster’s Unabridged Dictionary 1913 Edition