Source : Webster's Revised Unabridged Dictionary (1913)

Variolous \Va*ri"o*lous\, a. [LL. variolosus, fr. variola the
   smallpox: cf. F. varioleux.] (Med.)
   Of or pertaining to the smallpox; having pits, or sunken
   impressions, like those of the smallpox; variolar; variolic.

Source : WordNet®

variolous
     adj : relating to small pox [syn: {variolar}, {variolic}]