The Collaborative International Dictionary of English v.0.48:

Globosity \Glo*bos"i*ty\, n. [L. globositas: cf. F.
   globosit['e].]
   Sphericity. --Ray.
   [1913 Webster]

WordNet (r) 3.0 (2006):

globosity
    n 1: the roundness of a 3-dimensional object [syn: sphericity,
         sphericalness, globosity, globularness, rotundity,
         rotundness]