A wyrm is a huge serpent-like dragon similar to the guivre.

Also known as worm, vurm, orm, and ormr.

See Also: Creatures by Type » Dragons, Serpents

References

Rose, Carol. Giants, Monsters, and Dragons. New York: Norton, 2001.

Gutch, Eliza, & Peacock, M. G. W. County Folk-lore, Volume 5. London: David Nutt, 1908.