exobiology
noun
exo·bi·ol·o·gy ˌek-sō-bī-ˈä-lə-jē 
: a branch of biology concerned with the search for life outside the earth and with the effects of extraterrestrial environments on living organisms
exobiological
ˌek-sō-ˌbī-ə-ˈlä-ji-kəl
adjective exobiologist
ˌek-sō-bī-ˈä-lə-jist
noun 
Example Sentences
Recent Examples on the Web In the 1960s and ’70s, Drake played a major role in driving astrobiology—then called exobiology—into becoming a systematic field of study of the origins and evolution of life on alien worlds. 
WIRED, 11 Sep. 2022 Among them are conservation, artificial intelligence, biodiversity, exobiology and evolution. Alice George, Smithsonian Magazine, 3 Mar. 2020
WIRED, 11 Sep. 2022 Among them are conservation, artificial intelligence, biodiversity, exobiology and evolution. Alice George, Smithsonian Magazine, 3 Mar. 2020 Word History
First Known Use
1960, in the meaning defined above
Medical Definition
exobiology
noun
exo·bi·ol·o·gy -bī-ˈäl-ə-jē
plural exobiologies
: a branch of biology concerned with the search for life outside the earth and with the effects of extraterrestrial environments on living organisms
called also astrobiology