"eocén" meaning in Checo

{
  "categories": [
    {
      "kind": "other",
      "name": "CS:Palabras sin transcripción fonética",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "CS:Sustantivos",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "CS:Sustantivos masculinos",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Checo",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "grc",
        "2": "ἠώς",
        "3": "amanecer",
        "4": "grc",
        "5": "καινός",
        "6": "nuevo",
        "leng": "cs"
      },
      "expansion": "Del griego antiguo ἠώς (\"amanecer\") y καινός (\"nuevo\")",
      "name": "etimología"
    }
  ],
  "etymology_text": "Del griego antiguo ἠώς (\"amanecer\") y καινός (\"nuevo\").",
  "extra_sounds": {
    "pronunciación": "falta agregar"
  },
  "lang": "Checo",
  "lang_code": "cs",
  "pos": "noun",
  "pos_title": "sustantivo masculino",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "CS:Cronología",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "CS:Geología",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Eoceno."
      ],
      "id": "es-eocén-cs-noun-mvPLa2QR",
      "sense_index": "1",
      "topics": [
        "chronology",
        "geology"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "eocén"
}

{
  "categories": [
    "CS:Palabras sin transcripción fonética",
    "CS:Sustantivos",
    "CS:Sustantivos masculinos",
    "Checo"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "grc",
        "2": "ἠώς",
        "3": "amanecer",
        "4": "grc",
        "5": "καινός",
        "6": "nuevo",
        "leng": "cs"
      },
      "expansion": "Del griego antiguo ἠώς (\"amanecer\") y καινός (\"nuevo\")",
      "name": "etimología"
    }
  ],
  "etymology_text": "Del griego antiguo ἠώς (\"amanecer\") y καινός (\"nuevo\").",
  "extra_sounds": {
    "pronunciación": "falta agregar"
  },
  "lang": "Checo",
  "lang_code": "cs",
  "pos": "noun",
  "pos_title": "sustantivo masculino",
  "senses": [
    {
      "categories": [
        "CS:Cronología",
        "CS:Geología"
      ],
      "glosses": [
        "Eoceno."
      ],
      "sense_index": "1",
      "topics": [
        "chronology",
        "geology"
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "eocén"
}