Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The branch of biology dealing with extraterrestrial lifeforms.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

exo- +‎ biology

Examples

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