hypochondrium

from WordNet (r) 3.0 (2006)

hypochondrium
    n 1: the upper region of the abdomen just below the lowest ribs
         on either side of the epigastrium

from The Collaborative International Dictionary of English v.0.48

Hypochondrium \Hy`po*chon"dri*um\, n.; pl. L. {Hypochondria}, E.
   {Hypochondriums}. [L., fr. Gr. ?, from ? under the cartilage
   of the breastbone; ? under + ? cartilage.] (Anat.)
   Either of the hypochondriac regions.
   [1913 Webster]