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.
hypochondrium n : the upper region of the abdomen just below the lowest ribs on either side of the epigastrium [also: {hypochondria} (pl)]