Xenology derives from the Greek xenos, which as a substantive has the meaning "stranger, wanderer, refugee" and as an adjective "alien, foreign, strange, unusual." Xenology studies concepts considered to be alien, such as: the paranormal, extraterrestrials, subterraneans, and ultraterrestrials. Robert A. Freitas Jr. proposed this term in 1975 in his authored work, Xenology - An Introduction to The Scientific Study of Extraterrestrial Life, Intelligence, and Civilization.
- Ufology, a complimentary study of xenology
- ↑ Henry George Liddell, Robert Scott, A Greek-English Lexicon, new (ninth) edition, with a supplement, Clarendon Press, Oxford, 1968.