as·tro·bi·ol·o·gy

[as-troh-bahy-ol-uh-jee]
noun
(not in technical use) exobiology.

Origin:
1950–55; astro- + biology

as·tro·bi·o·log·i·cal [as-troh-bi-uh-loj-i-kuhl] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To astrobiology
Collins
World English Dictionary
astrobiology (ˌæstrəʊbaɪˈɒlədʒɪ) [Click for IPA pronunciation guide]
 
n
the branch of biology that investigates the possibility of life elsewhere in the universe

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Astrobiology has a plethora of syllables.
So is antidisestablishmentarianism. Does it mean:
opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
American Heritage
Science Dictionary
astrobiology   (ās'trō-bī-ŏl'ə-jē)  Pronunciation Key 
See exobiology.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

astrobiology

a multidisciplinary field dealing with the nature, existence, and search for extraterrestrial life (life beyond Earth). Astrobiology encompasses areas of biology, astronomy, and geology.

Learn more about astrobiology with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
And the scientific study of all aspects of biology related to the cosmos has
  been called astrobiology.
While the answer to that question will have to wait, in the meantime you can
  bone up on the nascent field of astrobiology.
Astrobiology is a relatively new science concerned with the frequency and
  nature of life in the universe.
Astrobiology is a tricky subject to write about these days.
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