Gnome
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A gnome /noʊm/[1] is a mythological creature and diminutive spirit in Renaissance magic and alchemy, first introduced by Paracelsus in the 16th century and later adopted by more recent authors including those of modern fantasy literature. Its characteristics have been reinterpreted to suit the needs of various story tellers, but it is typically said to be a small humanoid that lives underground.[2]

Origins
The word comes from Renaissance Latin gnomus, which first appears in A Book on Nymphs, Sylphs, Pygmies, and Salamanders, and on the Other Spirits by Paracelsus, published posthumously in Nysa in 1566 (and again in the Johannes Huser edition of 1589–1591 from an autograph by Paracelsus).[3]

The term may be an original invention of Paracelsus, possibly deriving the term from Latin gēnomos (itself representing a Greek γη-νομος, literally "earth-dweller"). In this case, the omission of the ē is, as the Oxford English Dictionary (OED) calls it, a blunder. Paracelsus uses Gnomi as a synonym of Pygmæi and classifies them as earth elementals. He describes them as two spans high, very reluctant to interact with humans, and able to move through solid earth as easily as humans move through air.[4] The chthonic, or earth-dwelling, spirit has precedents in numerous ancient and medieval mythologies, often guarding mines and precious underground treasures, notably in the Germanic dwarfs and the Greek Chalybes, Telchines or Dactyls.[2]