The Collaborative International Dictionary of English v.0.48:
Nephritis \Ne*phri"tis\, n. [L., fr. Gr. nefri^tis (sc. ?), fr. nefro`s a kidney.] (Med.) An inflammation of the kidneys. [1913 Webster]WordNet (r) 3.0 (2006):
nephritis n 1: an inflammation of the kidney [syn: nephritis, Bright's disease]