"Eohippus" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en conventions internationales issus d’un mot en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms scientifiques",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du grec ancien éo (« aube ») et grec ancien ἵππος, hippos (« cheval »)",
    "ou de \"éo\", comme « éocène » et grec ancien ἵππος, hippos (« cheval »)"
  ],
  "hypernyms": [
    {
      "raw_tags": [
        "équidés"
      ],
      "word": "Equidae"
    }
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "name",
  "pos_title": "Nom scientifique",
  "senses": [
    {
      "glosses": [
        "→ voir Hyracotherium"
      ],
      "id": "fr-Eohippus-conv-name-ogMlzE~f"
    }
  ],
  "synonyms": [
    {
      "word": "Hyracotherium"
    }
  ],
  "tags": [
    "masculine",
    "scientific"
  ],
  "word": "Eohippus"
}

{
  "categories": [
    "Mots en conventions internationales issus d’un mot en grec ancien",
    "Noms scientifiques",
    "conventions internationales"
  ],
  "etymology_texts": [
    "Du grec ancien éo (« aube ») et grec ancien ἵππος, hippos (« cheval »)",
    "ou de \"éo\", comme « éocène » et grec ancien ἵππος, hippos (« cheval »)"
  ],
  "hypernyms": [
    {
      "raw_tags": [
        "équidés"
      ],
      "word": "Equidae"
    }
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "name",
  "pos_title": "Nom scientifique",
  "senses": [
    {
      "glosses": [
        "→ voir Hyracotherium"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Hyracotherium"
    }
  ],
  "tags": [
    "masculine",
    "scientific"
  ],
  "word": "Eohippus"
}