Meaning of Nidhogg

Nid•hogg

Pronunciation: (nēd'hôg"), [key]
— n. Scand. Myth.
  1. a serpent in Niflheim who gnaws upon the lowermost root of Yggdrasil.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.