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Definition of cosmic dust noun from the Oxford Advanced Learner's Dictionary

cosmic dust

noun

/ˌkɒzmɪk ˈdʌst/

/ˌkɑːzmɪk ˈdʌst/

[uncountable] (astronomy)

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very small pieces of matter floating in spaceTopics Spacec2

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See cosmic dust in the Oxford Advanced American Dictionary

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