[ ek-soh-bahy-ol-uh-jee ]
/ ˌɛk soʊ baɪˈɒl ə dʒi /


the study of life beyond the earth's atmosphere, as on other planets.

Origin of exobiology

First recorded in 1955–60; exo- + biology

Related forms

ex·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. 2019

British Dictionary definitions for exobiology


/ (ˌɛksəʊbaɪˈɒlədʒɪ) /


another name for astrobiology

Derived Forms

exobiologist, 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

Science definitions for exobiology


[ ĕk′sō-bī-ŏlə-jē ]

The branch of biology that deals with the search for extraterrestrial life and the effects of extraterrestrial surroundings on living organisms. Also called astrobiology

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.