/niv"euhl haym'/ , n. Scand. Myth.
a place of eternal cold, darkness, and fog, ruled over by Hel: abode of those who die of illness or old age.
[ Niflheimr, equiv. to nifl- (c. OE nifol darkness, OHG nebal mist, cloud, L nebula (see NEBULA)) + heimr world, HOME ]