of, pertaining to, or typical of a Lower Paleolithic culture of the middle Pleistocene Epoch, characterized by large hand axes and cleavers made by the soft hammer technique.
Also, A⋅cheu⋅li⋅an.
Origin: 1890–95; < F acheuléen, named after St. Acheul, N France (Somme) (where remains were found) + -éen, var. of -ien (< L -iānus-ian), orig. with nouns ending in -é
A·cheu·li·an also A·cheu·le·an (ə-shōō'lē-ən) adj. Of or relating to a stage of tool culture of the Lower Paleolithic Period between the second and third interglacial periods, characterized by flaked bifacial hand axes.
[French acheuléen, after St. Acheul, a hamlet in northern France.]