Source : Webster's Revised Unabridged Dictionary (1913)

Varicosis \Var`i*cos"is\, n. [NL. See {Varix}, and {-osis}.]
   (Med.)
   The formation of varices; varicosity.

Source : WordNet®

varicosis
     n : pathological condition of being varicose or having varicose
         veins