The Collaborative International Dictionary of English v.0.48:

Renal \Re"nal\ (r[=e]"nal), a. [L. renalis, fr. renes the
   kidneys or reins: cf. F. r['e]nal. See Reins.] (Anat.)
   Of or pertaining to the kidneys; in the region of the
   kidneys.
   [1913 Webster]

   Renal capsules or Renal glands, the suprarenal capsules.
      See under Capsule.

   Renal casts, Renal colic. (Med.) See under Cast, and
      Colic.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Suprarenal \Su`pra*re"nal\, a. (Anat.)
   Situated above, or anterior to, the kidneys. -- n. A
   suprarenal capsule.
   [1913 Webster]

   Suprarenal capsules (Anat.), two small bodies of unknown
      function in front of, or near, the kidneys in most
      vertebrates. Also called renal capsules, and suprarenal
      bodies.
      [1913 Webster] Suprascalpular