What is "nephralgia"

Nephralgia \Ne*phral"gi*a\, Nephralgy \Ne*phral"gy\, n. [NL. nephralgia, fr. Gr. nefro`s a kidney + ? pain: cf. F. n['e]phralgie.] (Med.) Neuralgia of the kidneys; a disease characterized by pain in the region of the kidneys without any structural lesion of the latter.
--Quain.

n. neuralgia (i.e. pain) of the kidneys.

n. pain in the kidney (usually felt in the loins)