from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The branch of biology that deals with the search for extraterrestrial life and the effects of extraterrestrial surroundings on living organisms. Also called astrobiology, space biology.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The branch of biology dealing with extraterrestrial lifeforms.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life
exo- + biology (Wiktionary)