Hecatomb

Webster's Dictionary

(n.) A sacrifice of a hundred oxen or cattle at the same time; hence, the sacrifice or slaughter of any large number of victims.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

( Ἐκατόμ , from Ἑκατόν , One Hundred, and Βοῦς , an ox), a sacrifice offered by the ancient Greeks only on extraordinary occasions, consisting of one hundred oxen. The word is sometimes applied to an offering of other animals than oxen; and it is used occasionally to denote any large sacrifice, a definite number being used for an indefinite.