Sarcophagus (and its 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)—a kind of limestone used for sarcophagi supposedly aided in body decomposition.
Sarcophagous, an adjective, retains the literal Greek definition and means flesh-eating or carnivorous. Garner’s Modern English Usage is my only print dictionary to define this word, but it is listed on both Oxford English Dictionary and Merriam-Webster’s online resources. Bryan A. Garner also lists sarcophagic as an alternative, though it is a little less-common in writing.