sarcophagus (n.) Look up sarcophagus at Dictionary.com
"stone coffin," c.1600, from Latin sarcophagus, from Greek sarkophagos "limestone used for coffins," literally "flesh-eating," in reference to the supposed action of this type of limestone (quarried near Assos in Troas) in quickly decomposing the body, from sarx (genitive sarkos) "flesh" (see sarcasm) + phagein "to eat" (see -phagous).

The stone sense was the earliest in English; meaning "stone coffin, often with inscriptions or decorative carvings" is recorded from 1705. The Latin word, shortened in Vulgar Latin to *sarcus, is the source of French cercueil, German Sarg "coffin," Dutch zerk "tombstone."