Here you go, McTag, my spelling was off:
from
Merriam Webster Online
Main Entry: filé
Variant(s): also file /f&-'lA, (")fE-'lA, 'fE-(")lA/
Function: noun
Etymology: Louisiana French, from French, past participle of filer to twist, spin
Date: 1806
: powdered young leaves of sassafras used to thicken soups or stews