Caput Extorum
From BiblePortal Wikipedia
Caput Extorum [1]
was the convex upper portion of the liver, in animals, from the appearance of which, in the victims slain in sacrifice, the ancient Roman soothsayers drew their angluries. If that portion of the liver was unhealthy or wanting, the omen was unfavorable; but if it was healthy and well developed, the omen was favorable. (See Divination).
