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exobiology

[ek-soh-bahy-ol-uh-jee]
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noun
  1. the study of life beyond the earth's atmosphere, as on other planets.
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Origin of exobiology

First recorded in 1955–60; exo- + biology
Related formsex·o·bi·o·log·i·cal [ek-soh-bahy-uh-loj-i-kuh l] /ˌɛk soʊˌbaɪ əˈlɒdʒ ɪ kəl/, adjectiveex·o·bi·ol·o·gist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for exobiology

exobiology

noun
  1. another name for astrobiology
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Derived Formsexobiologist, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

exobiology in Science

exobiology

[ĕk′sō-bī-ŏlə-jē]
  1. The branch of biology that deals with the search for extraterrestrial life and the effects of extraterrestrial surroundings on living organisms. Also called astrobiology
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.