designating or of a Lower Paleolithic culture, characterized by chopping tools made by flaking
after Clacton-on-Sea, England, where such tools were found
See Clactonian in American Heritage Dictionary 4
Of or relating to an early Paleolithic tool culture of northwest Europe, characterized by simple core and flake tools. Traditionally considered to predate the Acheulian culture, it is now thought by some to be contemporaneous.