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Definition of cosmonaut noun from the Oxford Advanced Learner's Dictionary

cosmonaut

noun

/ˈkɒzmənɔːt/

/ˈkɑːzmənɔːt/

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an astronaut from the former Soviet UnionTopics Spacec1
Word Origin1950s: from cosmos, on the pattern of astronaut and Russian kosmonavt.

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See cosmonaut in the Oxford Advanced American Dictionary

Check pronunciation: cosmonaut

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