"bus oruga" meaning in Spanish

{
  "forms": [
    {
      "form": "buses orugas",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "buses oruga",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "+",
        "pl2": "buses oruga"
      },
      "expansion": "bus oruga m (plural buses orugas or buses oruga)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish nouns with multiple plurals",
          "parents": [
            "Nouns with multiple plurals",
            "Nouns by inflection type",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "articulated bus"
      ],
      "id": "en-bus_oruga-es-noun-9QilYF7D",
      "links": [
        [
          "articulated bus",
          "articulated bus"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "bus oruga"
}

{
  "forms": [
    {
      "form": "buses orugas",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "buses oruga",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "+",
        "pl2": "buses oruga"
      },
      "expansion": "bus oruga m (plural buses orugas or buses oruga)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish multiword terms",
        "Spanish nouns",
        "Spanish nouns with multiple plurals",
        "Spanish nouns with red links in their headword lines"
      ],
      "glosses": [
        "articulated bus"
      ],
      "links": [
        [
          "articulated bus",
          "articulated bus"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "bus oruga"
}