Literally meaning: “"biology of the foreigners"
Origin: Anc Greek
βίος/vios(=life) +(-λογία)/-logia(=logy, suffix meaning “study of”, “speech”, “discourse”) > λέω/leo (=speak).
in 1954 by science fiction writer Robert Heinlein in his work "The Star Beast"
Xenobiology is the study of extraterrestrial lifeforms