Concise Bible Dictionary:
The large and heavy gland that secretes the bile. In the sacrifices it is named only to point out the caul which is above it (Ex. 29:13,22; Lev. 3:4). To be wounded in the liver is fatal (Pro. 7:23). The liver being poured out is symbolical of deep anguish (Lam. 2:11, compare Job 16:13). Among the heathen the liver was one of the parts of an animal that were examined in order to foretell events, as practiced by the king of Babylon (Ezek. 21:21).
Strong’s Dictionary of Hebrew Words:
Meaning:
the same as 3515; the liver (as the heaviest of the viscera)