"4D ultrasound" meaning in English

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      "form": "4D ultrasounds",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "A medical ultrasound technique that produces a sequence of 3D images over time."
      ],
      "id": "en-4D_ultrasound-en-noun-dXKJFfnW",
      "links": [
        [
          "ultrasound",
          "ultrasound"
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      "raw_glosses": [
        "(uncountable) A medical ultrasound technique that produces a sequence of 3D images over time."
      ],
      "related": [
        {
          "_dis1": "90 10",
          "word": "3D ultrasound"
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      "tags": [
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      "glosses": [
        "An image so produced."
      ],
      "id": "en-4D_ultrasound-en-noun-2vo266ao",
      "raw_glosses": [
        "(countable) An image so produced."
      ],
      "tags": [
        "countable"
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  "word": "4D ultrasound"
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  "forms": [
    {
      "form": "4D ultrasounds",
      "tags": [
        "plural"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "3D ultrasound"
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  ],
  "senses": [
    {
      "categories": [
        "English uncountable nouns"
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      "glosses": [
        "A medical ultrasound technique that produces a sequence of 3D images over time."
      ],
      "links": [
        [
          "ultrasound",
          "ultrasound"
        ]
      ],
      "raw_glosses": [
        "(uncountable) A medical ultrasound technique that produces a sequence of 3D images over time."
      ],
      "tags": [
        "uncountable"
      ]
    },
    {
      "categories": [
        "English countable nouns"
      ],
      "glosses": [
        "An image so produced."
      ],
      "raw_glosses": [
        "(countable) An image so produced."
      ],
      "tags": [
        "countable"
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  "word": "4D ultrasound"
}