Lev·al·loi·si·an 
(lĕv′ə-loizē-ən)
(lĕv′ə-loizē-ən)adj.
Of or relating to a western European stage in Lower Paleolithic culture, characterized by a distinctive method of striking off flake tools from pieces of stone.
[After Levallois-Perret, city in north-central France.]