An Etymological Dictionary of the German Language/Flötz

by Friedrich Kluge

Flötz, n., older Fletze, n., ‘vein of ore,’ from MidHG. vlętze, n., ‘threshing-floor, vestibule, stratum,’ OHG. flęzzi; comp. AS. flętt, ‘floor of the hall,’ OIc. flet, ‘room, hall’; akin to the OIc. adj. flatr, OHG. flaȥ, ‘flat, wide, level,’ mentioned under Fladen and flach.