Source : Webster's Revised Unabridged Dictionary (1913)

Zoster \Zos"ter\, n. [L., fr. Gr. ? girdle, zoster. See {Zone}.]
   (Med.)
   Shingles.

Source : WordNet®

zoster
     n : eruptions along a nerve path often accompanied by severe
         neuralgia [syn: {herpes zoster}, {shingles}]