νεφρός

English (LSJ)

ὁ, in pl.,

   A kidneys, Diog.Apoll.6, Hp.Aph.4.78, Pl.Ti.91a, etc.: in dual, Ar.Ra.475: rarely in sg., Id.Lys.962, Euphro 1.25: euphem. for ὄρχεις, Philippid.5.4: metaph., LXXPs.15(16).7. (Cf. OHG. nioro 'kidney', Praenest. nefrones, Lanuv. nebrundines 'kidneys', 'testicles'.)