The Collaborative International Dictionary of English v.0.48:

Neuralgia \Neu*ral"gi*a\, n. [NL., from Gr. ney^ron nerve + ?
   pain. See nerve.] (Med.)
   A disease, the chief symptom of which is a very acute pain,
   exacerbating or intermitting, which follows the course of a
   nervous branch, extends to its ramifications, and seems
   therefore to be seated in the nerve. It seems to be
   independent of any structural lesion. --Dunglison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

neuralgia
    n 1: acute spasmodic pain along the course of one or more nerves
         [syn: neuralgia, neuralgy]