designating or of the oldest known Lower Paleolithic culture, characterized by pebble tools usually flaked in two directions to form simple cutters, choppers, scrapers, etc.
See Oldowan in American Heritage Dictionary 4
(ōlˈdə-wən, ôlˈ-)
adjective
Of or relating to an early stage of African Paleolithic tool culture characterized by choppers and bifacial chopping tools.