"protoactinium" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Dérivations en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Lemmes en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en anglais préfixés avec proto-",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Métaux en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    " ",
    "Dérivé de actinium, avec le préfixe proto-."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Noms indénombrables en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Termes vieillis en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Éléments chimiques en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Protactinium (l’élément chimique Pa)."
      ],
      "id": "fr-protoactinium-en-noun-H1ctauSp",
      "tags": [
        "dated",
        "uncountable"
      ],
      "topics": [
        "chemistry"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "nomenclature UICPA",
      "word": "protactinium"
    }
  ],
  "tags": [
    "singular"
  ],
  "word": "protoactinium"
}

{
  "categories": [
    "Dérivations en anglais",
    "Lemmes en anglais",
    "Mots en anglais préfixés avec proto-",
    "Métaux en anglais",
    "Noms communs en anglais",
    "anglais"
  ],
  "etymology_texts": [
    " ",
    "Dérivé de actinium, avec le préfixe proto-."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Noms indénombrables en anglais",
        "Termes vieillis en anglais",
        "Éléments chimiques en anglais"
      ],
      "glosses": [
        "Protactinium (l’élément chimique Pa)."
      ],
      "tags": [
        "dated",
        "uncountable"
      ],
      "topics": [
        "chemistry"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "nomenclature UICPA",
      "word": "protactinium"
    }
  ],
  "tags": [
    "singular"
  ],
  "word": "protoactinium"
}