micrometeorite

柯林斯词典

micrometeorite /ˌmaɪkrəʊˈmiːtɪəˌraɪt/

• 1. N a tiny meteorite having a diameter of 10–40 micrometres, found esp in rainwater and seawater, having entered the atmosphere as a micrometeoroid (extremely small meteoroid) 微小陨石

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