"décimo octavo" meaning in Spanish

{
  "forms": [
    {
      "form": "décima octava",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "décimos octavos",
      "tags": [
        "masculine",
        "plural"
      ]
    },
    {
      "form": "décimas octavas",
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "décimo octavo (feminine décima octava, masculine plural décimos octavos, feminine plural décimas octavas)",
      "name": "es-adj"
    }
  ],
  "hyphenation": [
    "dé‧ci‧mo"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "eighteenth",
          "word": "decimoctavo"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Spanish ordinal numbers",
          "parents": [
            "Ordinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative spelling of decimoctavo (“eighteenth”)"
      ],
      "id": "en-décimo_octavo-es-adj-1S3laS8H",
      "links": [
        [
          "ordinal number",
          "ordinal number"
        ],
        [
          "decimoctavo",
          "decimoctavo#Spanish"
        ]
      ],
      "raw_glosses": [
        "(ordinal number) Alternative spelling of decimoctavo (“eighteenth”)"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "numeral",
        "ordinal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌdeθimo oɡˈtabo/",
      "tags": [
        "Spain"
      ]
    },
    {
      "ipa": "[ˌd̪e.θi.mo oɣ̞ˈt̪a.β̞o]",
      "tags": [
        "Spain"
      ]
    },
    {
      "ipa": "/ˌdesimo oɡˈtabo/",
      "tags": [
        "Latin-America",
        "Philippines"
      ]
    },
    {
      "ipa": "[ˌd̪e.si.mo oɣ̞ˈt̪a.β̞o]",
      "tags": [
        "Latin-America",
        "Philippines"
      ]
    }
  ],
  "word": "décimo octavo"
}

{
  "forms": [
    {
      "form": "décima octava",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "décimos octavos",
      "tags": [
        "masculine",
        "plural"
      ]
    },
    {
      "form": "décimas octavas",
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "décimo octavo (feminine décima octava, masculine plural décimos octavos, feminine plural décimas octavas)",
      "name": "es-adj"
    }
  ],
  "hyphenation": [
    "dé‧ci‧mo"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "eighteenth",
          "word": "decimoctavo"
        }
      ],
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Spanish adjectives",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish links with redundant alt parameters",
        "Spanish multiword terms",
        "Spanish ordinal numbers",
        "Spanish terms with IPA pronunciation"
      ],
      "glosses": [
        "Alternative spelling of decimoctavo (“eighteenth”)"
      ],
      "links": [
        [
          "ordinal number",
          "ordinal number"
        ],
        [
          "decimoctavo",
          "decimoctavo#Spanish"
        ]
      ],
      "raw_glosses": [
        "(ordinal number) Alternative spelling of decimoctavo (“eighteenth”)"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "numeral",
        "ordinal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌdeθimo oɡˈtabo/",
      "tags": [
        "Spain"
      ]
    },
    {
      "ipa": "[ˌd̪e.θi.mo oɣ̞ˈt̪a.β̞o]",
      "tags": [
        "Spain"
      ]
    },
    {
      "ipa": "/ˌdesimo oɡˈtabo/",
      "tags": [
        "Latin-America",
        "Philippines"
      ]
    },
    {
      "ipa": "[ˌd̪e.si.mo oɣ̞ˈt̪a.β̞o]",
      "tags": [
        "Latin-America",
        "Philippines"
      ]
    }
  ],
  "word": "décimo octavo"
}