"PG" meaning in Français

{
  "anagrams": [
    {
      "word": "GP"
    }
  ],
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "de petit Gadz'Arts"
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français de la biochimie",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abréviation de peptidoglycane."
      ],
      "id": "fr-PG-fr-noun--0IF~vUa",
      "topics": [
        "biochemistry"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Argot de l’école nationale supérieure des Arts et Métiers en français",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Élève des Écoles d’Arts et Métiers (conscrits, anciens, P3)."
      ],
      "id": "fr-PG-fr-noun-RDsQPTyr",
      "tags": [
        "slang"
      ],
      "topics": [
        "Gadz'Arts"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pe.ʒe\\"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "PG"
}

{
  "anagrams": [
    {
      "word": "GP"
    }
  ],
  "categories": [
    "Lemmes en français",
    "Noms communs en français",
    "français"
  ],
  "etymology_texts": [
    "de petit Gadz'Arts"
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en français de la biochimie"
      ],
      "glosses": [
        "Abréviation de peptidoglycane."
      ],
      "topics": [
        "biochemistry"
      ]
    },
    {
      "categories": [
        "Argot de l’école nationale supérieure des Arts et Métiers en français"
      ],
      "glosses": [
        "Élève des Écoles d’Arts et Métiers (conscrits, anciens, P3)."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "Gadz'Arts"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pe.ʒe\\"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "PG"
}