The Collaborative International Dictionary of English v.0.48:

Inguinal \In"gui*nal\, a. [L. inguinalis, fr. inguen, inguinis,
   the groin: cf. F. inguinal.] (Astron. & Med.)
   Of or pertaining to, or in the region of, the inguen or
   groin; as, an inguinal canal or ligament; inguinal hernia.
   [1913 Webster]

   Inguinal ring. See Abdominal ring, under Abdominal.
      [1913 Webster]

WordNet (r) 3.0 (2006):

inguinal
    adj 1: of or relating to or near the groin