Definitions for clactonianklækˈtoʊ ni ən
Random House Webster's College Dictionary
Clac•to•ni•anklækˈtoʊ ni ən(adj.)
of, pertaining to, or characteristic of a Lower Paleolithic culture in England marked by the production of tools made from stone flakes.
Origin of Clactonian:
1930–35; < F clactonien, after Clacton(-on-Sea), English town where the tools were first unearthed