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Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.

Search results for 'astronaut':

astronaut noun someone who is trained to travel in a space vehicle. See also cosmonaut.
ETYMOLOGY: 1920s: from astro-, modelled on aeronaut.