A holocaust is a religious animal sacrifice that is completely consumed by fire. The word derives from the Ancient Greek holokaustos which is used solely for one of the major forms of sacrifice, also known as a burnt offering. Etymology and usage The word holocaust derives from the Middle English holocaust, which derived from the Anglo-Norman holocauste and Late Latin holocaustum. Its original root was the neuter form of the Ancient Greek holokaustos (ὁλόκαυστος), from ὅλος (hólos, “whole”) + καυστός (kaustós, "burnt") or καίω (kaíō, "I burn") with the use of rough breathing to pronounce the leading h. Greek sacrifice Holokautein (ὁλοκαυτεῖν) is one of the two chief verbs of Greek sacrifice, in which the victim is utterly destroyed and burnt up, as opposed to thúesthai (θύεσθαι), to share a meal with the god and one's fellow worshippers, commensal sacrifice. In the latter, the edible parts of the sacrificed animal were roasted and distributed for festive celebration, whereas the inedible parts were burned on the altar, those being the god's share. Although not actually obliged to do so, Greeks would rather sacrifice a domestic animal to a god or hero and then proceed to use its flesh as food than simply consume it without a sacrifice, as animals were thought of as sharing in the sanctity of life, in addition to their secular usefulness (milk, eggs, ploughing). This did not apply to game, fish, and other seafood, which formed a far larger proportion of the diet than they do today – fish was the major foodstuff sold in ancient Greek marketplaces. A sacrifice need not be a public function involving priests and altars; they could also be held privately, domestically or individually. These are the two ideal types of Greek sacrificial ritual; they are appropriate to different divinities, done for different purposes, and conducted by different methods. Holocausts are apotropaic rituals, intended to appease the spirits of the Underworld, including the Greek heroes, who are spirits of the dead; they are also given to dangerous powers, such as the Keres and Hecate. One of the earliest attested holocausts was Xenophon's offering of pigs to Zeus Meilichius. Holocausts are conducted at night, without wine, and offer black-hided animals at a low altar, with their heads directed downwards; in all these they are opposed to the commensal sacrifice given to the Olympian gods. (This distinction is between extreme types, and was somewhat