"radiopaque" meaning in English

{
  "antonyms": [
    {
      "word": "radiolucent"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "radio",
        "3": "opaque"
      },
      "expansion": "radio- + opaque",
      "name": "prefix"
    }
  ],
  "etymology_text": "radio- + opaque",
  "forms": [
    {
      "form": "more radiopaque",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most radiopaque",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "radiopaque (comparative more radiopaque, superlative most radiopaque)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with radio-",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "impenetrable to X-rays and other radiation"
      ],
      "id": "en-radiopaque-en-adj-4UrzIKf7",
      "links": [
        [
          "impenetrable",
          "impenetrable"
        ],
        [
          "X-ray",
          "X-ray"
        ],
        [
          "radiation",
          "radiation"
        ]
      ],
      "related": [
        {
          "word": "radiopacity"
        }
      ]
    }
  ],
  "word": "radiopaque"
}

{
  "antonyms": [
    {
      "word": "radiolucent"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "radio",
        "3": "opaque"
      },
      "expansion": "radio- + opaque",
      "name": "prefix"
    }
  ],
  "etymology_text": "radio- + opaque",
  "forms": [
    {
      "form": "more radiopaque",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most radiopaque",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "radiopaque (comparative more radiopaque, superlative most radiopaque)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "radiopacity"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with radio-"
      ],
      "glosses": [
        "impenetrable to X-rays and other radiation"
      ],
      "links": [
        [
          "impenetrable",
          "impenetrable"
        ],
        [
          "X-ray",
          "X-ray"
        ],
        [
          "radiation",
          "radiation"
        ]
      ]
    }
  ],
  "word": "radiopaque"
}