"exon" 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 suffixés avec -on",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(1978) Mot forgé par Walter Gilbert ^([1]), dérivé de express (« exprimer »), avec le suffixe -on : « The notion of the cistron… must be replaced by that of a transcription unit containing regions which will be lost from the mature messenger – which I suggest we call introns (for intragenic regions) – alternating with regions which will be expressed – exons » — (Walter Gilbert, « Why genes in pieces? », Nature, février 1978)"
  ],
  "forms": [
    {
      "form": "exons",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en anglais de la génétique",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Exon."
      ],
      "id": "fr-exon-en-noun-FRBiXcAZ",
      "raw_tags": [
        "Génétique"
      ]
    }
  ],
  "word": "exon"
}

{
  "categories": [
    "Dérivations en anglais",
    "Lemmes en anglais",
    "Mots en anglais suffixés avec -on",
    "Noms communs en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "(1978) Mot forgé par Walter Gilbert ^([1]), dérivé de express (« exprimer »), avec le suffixe -on : « The notion of the cistron… must be replaced by that of a transcription unit containing regions which will be lost from the mature messenger – which I suggest we call introns (for intragenic regions) – alternating with regions which will be expressed – exons » — (Walter Gilbert, « Why genes in pieces? », Nature, février 1978)"
  ],
  "forms": [
    {
      "form": "exons",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en anglais de la génétique"
      ],
      "glosses": [
        "Exon."
      ],
      "raw_tags": [
        "Génétique"
      ]
    }
  ],
  "word": "exon"
}