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Related to exobiology: astrobiology, Xenobiology
The branch of biology that focuses on the search for extraterrestrial life and the conditions conducive to the development of life, often using the techniques of astronomy to make measurements or observations.
ex′o·bi′o·log′i·cal (-ə-lŏj′ĭ-kəl) adj.
The biological science of the universe, exclusive of our planet.