I would be interested to know the history of the word nephros, however, because I think in Bible times there was very little understanding about the organs of the body. So maybe nephros had some other meaning which we then applied to the kidneys.
nephro- (nef¡är¨, rə)
kidney nephrotomy, epinephrine
Etymology: < Gr nephros, kidney < IE base *negwhros, kidney, te
Forum:
"Cults," Sects, and "New Religious Movements"