The Collaborative International Dictionary of English v.0.48:

Superpartient \Su`per*par"tient\, a. [L. superpartiens; super
   over + partiens, p. pr. of partire to divide.] (Math.)
   Of or pertaining to a ratio when the excess of the greater
   term over the less is more than a unit, as that of 3 to 5, or
   7 to 10. [Obs.] --Hutton.
   [1913 Webster]