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xenobiology
xenobiology n. 
/ˌzinoʊˌbaɪˈɑlədʒi/ the investigation of extraterrestrial life forms; = exobiology n. at exo- prefix .
Brit. /ˌzɛnə(ʊ)bʌɪˈɒlədʒi/
, /ˌzɛnə(ʊ)bʌɪˈɒlədʒi/U.S. /ˌzɛnoʊˌbaɪˈɑlədʒi/
, /ˌzɛnoʊˌbaɪˈɑlədʒi//ˌzinoʊˌbaɪˈɑlədʒi/ΘΚΠ
the world > the universe > cosmology > astronomy > xenology > [noun] > xenobiology
xenobiology1954
1954 R. A. Heinlein in Mag. of Fantasy & Sci. Fiction July 90 I have never taken any interest in xenobiology.
1961 Science 21 July 223/1 The proper word, as any science-fiction reader should know, for the study of, say, extraterrestrial biology is ‘xenobiology’, not ‘exobiology’... [Citing Heinlein] I am not certain that I coined the term; it is quite possible that I saw it used elsewhere, in fiction or non-fiction, and made use of it.
1983 Nature 13 Jan. 106/2 The almost-virgin xeno- prefix should be used to designate extraterrestrial entities.., concepts and subdisciplines (for example, xeno-biology, xenosociology), and exo- reserved for life outside of but native to Earth.
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