MallophagaPronunciation: /məˈlɒfəgə/Definition of Mallophaga noun Entomology an order of insects that comprises the biting lice. See also Phthiraptera.Derivatives mallophagan noun & adjective Origin:modern Latin (plural), from Greek mallos 'lock of wool' + -phagos 'eating'Mallophaga in other Oxford dictionaries Definition of Mallophaga in the US English dictionary