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moonshot

or moon shot

[moon-shot]
noun
  1. the act or procedure of launching a rocket or spacecraft to the moon.
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Origin of moonshot

An Americanism dating back to 1955–60; moon + shot1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for moon-shot

moonshot

noun
  1. the launching of a spacecraft, rocket, etc, to the moon
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for moon-shot

n.

1958, from moon (n.) + shot (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper