of or having to do with a North American culture of the late Pleistocene Epoch characterized by the use of stone spearheads with fluted sides
See Folsom in American Heritage Dictionary 4
(fōlˈsəm)
adjective
Of or relating to a culture that flourished in western North America east of the Rocky Mountains during the late Pleistocene Epoch, notable chiefly for the use of grooved, leaf-shaped flint projectile points.