"dado rail" meaning in English

{
  "forms": [
    {
      "form": "dado rails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dado rail (plural dado rails)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Architecture",
          "orig": "en:Architecture",
          "parents": [
            "Applied sciences",
            "Art",
            "Sciences",
            "Culture",
            "All topics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A horizontal moulding fixed to an interior wall about 4-5 feet above the floor."
      ],
      "id": "en-dado_rail-en-noun-3uakjtL-",
      "links": [
        [
          "horizontal",
          "horizontal"
        ],
        [
          "moulding",
          "moulding"
        ],
        [
          "wall",
          "wall"
        ],
        [
          "feet",
          "feet"
        ],
        [
          "floor",
          "floor"
        ]
      ],
      "related": [
        {
          "word": "wainscot"
        }
      ],
      "wikipedia": [
        "dado rail"
      ]
    }
  ],
  "word": "dado rail"
}

{
  "forms": [
    {
      "form": "dado rails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dado rail (plural dado rails)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "wainscot"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Architecture"
      ],
      "glosses": [
        "A horizontal moulding fixed to an interior wall about 4-5 feet above the floor."
      ],
      "links": [
        [
          "horizontal",
          "horizontal"
        ],
        [
          "moulding",
          "moulding"
        ],
        [
          "wall",
          "wall"
        ],
        [
          "feet",
          "feet"
        ],
        [
          "floor",
          "floor"
        ]
      ],
      "wikipedia": [
        "dado rail"
      ]
    }
  ],
  "word": "dado rail"
}