"warm dark matter" meaning in English

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      "glosses": [
        "Dark matter traveling at relativistic, but not ultrarelativistic, speeds."
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          "travel",
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          "relativistic",
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          "ultrarelativistic",
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      "related": [
        {
          "word": "cold dark matter"
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          "word": "hot dark matter"
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        "warm dark matter"
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  "word": "warm dark matter"
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