LSJ
ὁ, fem. νεφρῖτις, ἡ, = νεφριαῖος, σφόνδυλος, i.e. the first vertebra of the sacrum, Poll. 2.179; νόσον νεφρῖτιν Th. 7.15; φθίσις ν. Hp. Int. 15; also as Subst. νεφρῖτις (sc. νόσος), ἡ, Id. Coac. 502; in pl., Id. Aph. 3.31, Dsc. 1.14.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)