"fairy, elf." A wantonly mischievous spirit who is particularly intrusive on women in birth pains and reputed to be a thief of newborn infants. It is one of the most common figures in Highland lore. A seventeenth-century clergyman of the Kirk denounced the s'thich for its peculiar, flint-like deadly weapons.
The Scottish Gaelic words s'thiche and s'thichean refer to the realm of the fairy.
- MacKillop, James. (2004). Dictionary of Celtic Mythology. New York: Oxford University Press, Inc.