Xenology is the study of extraterrestrial life, and alien forms. In academia, its acknowledgement is limited to astrobiology, in terms of micro-organisms found in space. The term “xenology” was proposed in 1975 by Robert A. Freitas Jr., in his authored work, Xenology - An Introduction to The Scientific Study of Extraterrestrial Life, Intelligence, and Civilization.
“Xeno-” derives from the Greek xenos, which as a substantive has the meaning "stranger, wanderer, refugee" and as an adjective "alien, foreign, strange, unusual."
- ↑ Henry George Liddell, Robert Scott, A Greek-English Lexicon, new (ninth) edition, with a supplement, Clarendon Press, Oxford, 1968.