"roundness" in the noun sense
1. roundness, rotundity
the fullness of a tone of voice
"there is a musky roundness to his wordiness"
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"
the property possessed by a line or surface that is curved and not angular
4. plumpness, embonpoint, roundness
the bodily property of being well rounded
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License