Sarcophagus n. : A species of limestone used among the Greeks for making coffins, which was so called because it consumed within a few weeks the flesh of bodies deposited in it. It is otherwise called lapis Assius, or Assian stone, and is said to have been found at Assos, a city of Lycia.

Sarcophagus n. : A coffin or chest-shaped tomb of the kind of stone described above; hence, any stone coffin.

Sarcophagus n. : A stone shaped like a sarcophagus and placed by a grave as a memorial.

Example:
What is a Good Idea for an Egyptian Sarcophagus with a twist?

Taxonomy
sarcophagus, Sarcophagi, stone sarcophagus, free encyclopedia, limestone, Quails, coffins, Sarcophagus of the Spouses, flesh eater, layer, corpses, tombs, search, receptacle, cut from stone, sarx, phagein, flesh-eating.

Defination from the web:
... In Ancient Egypt, a sarcophagus formed the external layer of protection for a royal mummy, with several layers of coffins nested within, and was ...