Full record for xenobiology n.

Definition the investigation of extraterrestrial life forms
OED requirements antedating 1954
Earliest cite 1954 R. Heinlein 'The Star Lummox'
Last modified 31 July, 2019

Citations for xenobiology n.

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1972 M. Bradley Darkover Landfall vi. 64 There have been intelligent life-forms reported from three or four other planets; so far they have reported one simian, one feline, and three unclassifiable–xenobiology isn't my specialty.
1984 D. Duane My Enemy, my Ally vi. 79 ‘I thought he was in Life Sciences.’‘Xenobiology?.This is his hobby, though. It's useful enough’.
1995 A. D. Foster Life Form iii. 36 As soon as he reached the port he knew that the heretofore grand discoveries of lichen and fungi on Tycho V and Burke had been instantly relegated to the realm of footnotes in the young world of xenobiology.
1996 W. Shatner Return xxix. 222 Starfleet's xenobiology records didn't either.
2004 P. F. Hamilton Pandora's Star vii. 167 A little town of industrial-style buildings surrounded it, containing offices, laboratories, workshops, training facilities, and the xenobiology department.