ἡπατικός

Greek hēpar (genitive hēpatos) meant liver. The adjective hēpatikos described anything relating to that organ. In Greek mythology, the liver held special status: Zeus punished Prometheus by having an eagle eat his liver daily, and it regenerated each night. The Greeks did not know about hepatic regeneration in the modern sense, but they chose the one organ that actually does regenerate when they invented the myth. The coincidence is striking.

Ancient Greek diviners practiced hepatoscopy -- reading the future in the livers of sacrificed animals. The Babylonians did this before them, and the Etruscans after them. The liver was the organ of prophecy across the ancient Mediterranean. Hippocrates, more practically, described hepatic diseases including jaundice and what was almost certainly hepatitis, though he attributed the yellowing to bile imbalance rather than infection.

Latin adopted hepaticus directly from Greek. Medieval herbalists named the plant Hepatica (liverwort) because its three-lobed leaves resembled the liver's shape. This was the Doctrine of Signatures in action -- the belief, widespread in medieval medicine, that God had marked plants to show their medicinal purpose. Hepatica was prescribed for liver ailments on the basis of appearance alone. It did not work.

English hepatic arrived in the 1540s. The word now anchors serious medical terminology: hepatitis (liver inflammation, identified as viral by Baruch Blumberg in 1967, earning him the Nobel Prize), hepatology, hepatocyte, hepatic portal vein. The liver processes nearly everything that enters the bloodstream. The Greeks, who saw prophecy in it, were not entirely wrong -- the liver reveals what the body has consumed, absorbed, and tried to survive.