SPHERICITY
sphericity, sphericalness, globosity, globularness, rotundity, rotundness
(noun) the roundness of a 3-dimensional object
Source: WordNet® 3.1
Etymology
Noun
sphericity (countable and uncountable, plural sphericities)
(chiefly, uncountable) The quality of being spherical, being a sphere.
(geometry, countable) The ratio of the surface area of a given particle to the surface area of a sphere with the same volume.
Synonyms
• (being a sphere): sphericality, sphericalness, sphereness; orbicularity, roundness
Source: Wiktionary
Sphe*ric"i*ty, n. Etym: [Cf. F. sphéricité.]
Definition: The quality or state of being spherial; roundness; as, the
sphericity of the planets, or of a drop of water.
Source: Webster’s Unabridged Dictionary 1913 Edition