LevalloisPronunciation: /ləˈvalwɑː/Definition of Levallois noun [usually as modifier] Archaeology a flint-working technique associated with the Mousterian culture of the Neanderthals, in which a flint is trimmed so that a flake of predetermined size and shape can be struck from it. Derivatives LevalloiseanPronunciation: /ˌlɛvəˈlɔɪzɪən/ adjective Origin: early 20th century: named after a suburb of northern ParisLevallois in other Oxford dictionaries Definition of Levallois in the US English dictionary