ne·phrol·o·gy /nɪˈfrɑləʤi/
  腎臟學
  Ne·phrol·o·gy n.  A treatise on, or the science which treats of, the kidneys, and their structure and functions.
  ◄ ►
  nephrology
       n : the branch of medicine concerned with the kidney - its
           development and anatomy and physiology and disorders