"ultrasound" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms prefixed with ultra-",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ultra",
        "2": "sound"
      },
      "expansion": "ultra- + sound",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "ultra- + sound",
  "forms": [
    {
      "form": "ultrasound",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "ultrasounds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Physics",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Ultrasound is the sound with a frequency greater than the upper limit of human hearing."
      ],
      "id": "simple-ultrasound-en-noun-2BDUaVMd",
      "raw_tags": [
        "physics"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Medicine",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Ultrasound is the use of ultrasonic waves for diagnostic or therapeutic purposes."
      ],
      "id": "simple-ultrasound-en-noun-3j7bM8fW",
      "raw_tags": [
        "medicine"
      ]
    }
  ],
  "word": "ultrasound"
}

{
  "categories": [
    "Terms prefixed with ultra-"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ultra",
        "2": "sound"
      },
      "expansion": "ultra- + sound",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "ultra- + sound",
  "forms": [
    {
      "form": "ultrasound",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "ultrasounds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Physics"
      ],
      "glosses": [
        "Ultrasound is the sound with a frequency greater than the upper limit of human hearing."
      ],
      "raw_tags": [
        "physics"
      ]
    },
    {
      "categories": [
        "Medicine"
      ],
      "glosses": [
        "Ultrasound is the use of ultrasonic waves for diagnostic or therapeutic purposes."
      ],
      "raw_tags": [
        "medicine"
      ]
    }
  ],
  "word": "ultrasound"
}