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cosmonautics

[koz-muh-naw-tiks, -not-iks] /ˌkɒz məˈnɔ tɪks, -ˈnɒt ɪks/
noun, (used with a singular verb)
1.
astronautics, especially as applied to space flight.
Origin
1945-1950
1945-50; see cosmonaut, -ics
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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