"metrochrome" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "metro",
        "3": "chrome"
      },
      "expansion": "metro- + -chrome",
      "name": "confix"
    }
  ],
  "etymology_text": "From metro- + -chrome.",
  "forms": [
    {
      "form": "metrochromes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "metrochrome (plural metrochromes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "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 metro-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -chrome",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "An instrument with a lantern for measuring colours, used in conjunction with a telescope to note the colours of stars."
      ],
      "id": "en-metrochrome-en-noun-bEP1bGZs",
      "links": [
        [
          "instrument",
          "instrument"
        ],
        [
          "lantern",
          "lantern"
        ],
        [
          "colour",
          "colour"
        ],
        [
          "telescope",
          "telescope"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(historical) An instrument with a lantern for measuring colours, used in conjunction with a telescope to note the colours of stars."
      ],
      "tags": [
        "historical"
      ]
    }
  ],
  "word": "metrochrome"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "metro",
        "3": "chrome"
      },
      "expansion": "metro- + -chrome",
      "name": "confix"
    }
  ],
  "etymology_text": "From metro- + -chrome.",
  "forms": [
    {
      "form": "metrochromes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "metrochrome (plural metrochromes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with metro-",
        "English terms suffixed with -chrome",
        "English terms with historical senses"
      ],
      "glosses": [
        "An instrument with a lantern for measuring colours, used in conjunction with a telescope to note the colours of stars."
      ],
      "links": [
        [
          "instrument",
          "instrument"
        ],
        [
          "lantern",
          "lantern"
        ],
        [
          "colour",
          "colour"
        ],
        [
          "telescope",
          "telescope"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(historical) An instrument with a lantern for measuring colours, used in conjunction with a telescope to note the colours of stars."
      ],
      "tags": [
        "historical"
      ]
    }
  ],
  "word": "metrochrome"
}