Noun
The quality or state of being spherial; roundness; as, the sphericity of the planets, or of a drop of water.
Source: Webster's dictionaryAt the same time, Isidore's works also gave the views of sphericity, for example, in chapter 28 of De Natura Rerum, Isidore claims that the sun orbits the earth and illuminates the other side when it is night on this side. Source: Internet
In order to focus the shock wave on the center of the target, the target must be made with extremely high precision and sphericity with aberrations of no more than a few micrometres over its surface (inner and outer). Source: Internet
The large number of surviving manuscripts of The Reckoning of Time, copied to meet the Carolingian requirement that all priests should study the computus, indicates that many, if not most, priests were exposed to the idea of the sphericity of the Earth. Source: Internet
Contemporary writers also wrote about eclipses and the sphericity of heavenly bodies. Source: Internet