n.a great sacrifice; an ancient Greek or Roman sacrifice of 100 oxen
英汉双解大词典
hecatomb/ˈhɛkəˌtəʊm, -ˌtuːm/
1.
N（名词）
(in ancient Greece or Rome) any great public sacrifice and feast, originally one in which 100 oxen were sacrificed (古希腊或罗马)百牲祭; 大型公众祭奠饮宴活动，起初需要宰杀100头牛做祭祀