The Collaborative International Dictionary of English v.0.48:

Varisse \Va*risse"\, n. [Cf. F. varice varix. Cf. Varix.]
   (Far.)
   An imperfection on the inside of the hind leg in horses,
   different from a curb, but at the same height, and often
   growing to an unsightly size.
   [Webster 1913 Suppl.]