Sarcophagus (plural, sarcophagi) refers to the box-like stone coffin often associated with ancient Egypt, Greece, and Rome. The word comes from the ancient Greek sarx (flesh) + phagein (to eat) and means, literally, flesh-eating. Supposedly, a kind of limestone used for sarcophagi aided in body decomposition.
Sarcophagous, an adjective, retains the literal Greek definition and means flesh-eating or carnivorous. Bryan A. Garner introduced me to this word, which I found in none of my print dictionaries but confirmed with their respective online resources. Garner also suggests sarcophagic as an alternative, which is a little less-common in written usage.