The seat of the carnal affections (Titus 1:12; Phil. 3:19; Rom. 16:18). The word is used symbolically for the heart (Prov. 18:8; 20:27; 22:18, marg.). The "belly of hell" signifies the grave or underworld (Jonah 2:2).
Easton's Bible Dictionary. M.G. Easton. 1897.