"spacefilling model" meaning in English

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  "lang_code": "en",
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          "word": "space-filling model"
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        "Alternative form of space-filling model"
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      "id": "en-spacefilling_model-en-noun-syRrGRt6",
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  "word": "spacefilling model"
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      "form": "spacefilling models",
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          "word": "space-filling model"
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      "glosses": [
        "Alternative form of space-filling model"
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  "word": "spacefilling model"
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