Extispicium
Derived from the word for entrails (exta) and the verb to look at (specto), extispicium is the art of interpreting the entrails of sacrifical animals. The interpretation involved determining the will of the gods. Etruscan soothsays in Rome, called Haruspices, interpreted the color, markings, and shape of liver and gallbladder at most public sacrifices held within or outside Rome.
The Etruscans were said to have been taught the art of haruspiy from a grandson of Jupiter named Tages.