"micrometastasis" meaning in English

{
  "etymology_templates": [
    {
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        "2": "micro",
        "3": "metastasis"
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      "expansion": "micro- + metastasis",
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  ],
  "etymology_text": "micro- + metastasis",
  "head_templates": [
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      "args": {
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      "expansion": "micrometastasis (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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        {
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          "name": "English terms prefixed with micro-",
          "parents": [],
          "source": "w"
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      ],
      "glosses": [
        "The microscopic level action of metastasis, the spread of disease from the primary site to other areas."
      ],
      "id": "en-micrometastasis-en-noun-7T1DgBZt",
      "links": [
        [
          "microscopic",
          "microscopic"
        ],
        [
          "metastasis",
          "metastasis"
        ],
        [
          "disease",
          "disease"
        ],
        [
          "primary",
          "primary"
        ]
      ],
      "related": [
        {
          "word": "micrometastatic"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "micrometastasis"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "micro",
        "3": "metastasis"
      },
      "expansion": "micro- + metastasis",
      "name": "prefix"
    }
  ],
  "etymology_text": "micro- + metastasis",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "micrometastasis (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "micrometastatic"
    }
  ],
  "senses": [
    {
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        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with micro-",
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      ],
      "glosses": [
        "The microscopic level action of metastasis, the spread of disease from the primary site to other areas."
      ],
      "links": [
        [
          "microscopic",
          "microscopic"
        ],
        [
          "metastasis",
          "metastasis"
        ],
        [
          "disease",
          "disease"
        ],
        [
          "primary",
          "primary"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "micrometastasis"
}