/lev'euh loy"zee euhn, -zheuhn/ , adj.
of, pertaining to, or characteristic of a distinctive late Lower and Middle Paleolithic method of preparing a stone core so that preformed thin, oval or triangular flakes with sharp edges could be struck from it.
Also, Levallois /leuh val"wah/ .
[ 1930-35; LEVALLOIS(-PERRET) + -IAN ]