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astronaut

 - 2 dictionary results

as⋅tro⋅naut

  [as-truh-nawt, -not]
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–noun
a person engaged in or trained for spaceflight.
Origin:
1925–30; astro- + (aero)naut, prob. via F astronaute; see astronautical
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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as·tro·naut   (ās'trə-nôt')   
n.  A person trained to pilot, navigate, or otherwise participate as a crew member of a spacecraft.

[astro- + Greek nautēs, sailor (from naus, ship; see nāu- in Indo-European roots).]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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