A sarcophagus (pl.: sarcophagi or sarcophaguses) is a coffin, most commonly carved in stone, and usually displayed above ground, though it may also be buried. The word sarcophagus comes from the Greekσάρξsarx meaning "flesh", and φαγεῖνphagein meaning "to eat"; hence sarcophagus means "flesh-eating", from the phrase lithos sarkophagos (λίθοςσαρκοφάγος), "flesh-eating stone". The word also came to refer to a particular kind of limestone that was thought to rapidly facilitate the decomposition of the flesh of corpses contained within it due to the chemical properties of the limestone itself.[1][2]
^WordInfo etymology. As a noun, the Greek term was further adopted to mean "coffin" and was carried over into Latin, where it was used in the phrase lapis sarcophagus, "flesh-eating stone", referring to those same properties of limestone.