"test bed" meaning in English

{
  "forms": [
    {
      "form": "test beds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "test bed (plural test beds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "testbed"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Since that set of articles is already fairly complete, they might serve as a good test bed for the different organizational systems we want to try.",
          "type": "example"
        },
        {
          "ref": "1961 March, “English Electric gas turbine locomotive begins trials”, in Trains Illustrated, page 152",
          "text": "Although its wheel size and arrangement seem far from ideal for a high-powered modern motive power unit, No. GT3 is clearly intended as far more than just another travelling test-bed.",
          "type": "quotation"
        },
        {
          "ref": "2023 February 22, Howard Johnston, “Southern '313s': is the end now in sight?”, in RAIL, number 977, page 43",
          "text": "It was taken out of passenger service in early 2013, for conversion into a test bed for the commissioning of the European Rail Traffic Management System (ERTMS) on the Hertford Loop and elsewhere.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of testbed"
      ],
      "id": "en-test_bed-en-noun-h3Vm3Gv4",
      "links": [
        [
          "testbed",
          "testbed#English"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Alternative form of testbed"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-test bed.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/51/En-au-test_bed.ogg/En-au-test_bed.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/51/En-au-test_bed.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "test bed"
}

{
  "forms": [
    {
      "form": "test beds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "test bed (plural test beds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "testbed"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with audio links",
        "English terms with quotations",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "Since that set of articles is already fairly complete, they might serve as a good test bed for the different organizational systems we want to try.",
          "type": "example"
        },
        {
          "ref": "1961 March, “English Electric gas turbine locomotive begins trials”, in Trains Illustrated, page 152",
          "text": "Although its wheel size and arrangement seem far from ideal for a high-powered modern motive power unit, No. GT3 is clearly intended as far more than just another travelling test-bed.",
          "type": "quotation"
        },
        {
          "ref": "2023 February 22, Howard Johnston, “Southern '313s': is the end now in sight?”, in RAIL, number 977, page 43",
          "text": "It was taken out of passenger service in early 2013, for conversion into a test bed for the commissioning of the European Rail Traffic Management System (ERTMS) on the Hertford Loop and elsewhere.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of testbed"
      ],
      "links": [
        [
          "testbed",
          "testbed#English"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Alternative form of testbed"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-test bed.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/51/En-au-test_bed.ogg/En-au-test_bed.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/51/En-au-test_bed.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "test bed"
}