"ppb" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Sigles en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Unités de mesure en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(Sigle) Sigle de parts per billion (« partie par milliard »). Il est à noter que billion en anglais est milliard en français."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "notes": [
    "Le National Institute of Standards and Technology des États-Unis recommande de ne pas utiliser ppm, ppb, ppt, etc."
  ],
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "ppm"
    },
    {
      "word": "ppt"
    },
    {
      "word": "ppq"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Partie par milliard."
      ],
      "id": "fr-ppb-en-noun-eupWgzSS"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˌpi.ˌpi.ˈbi\\",
      "raw_tags": [
        "États-Unis"
      ]
    },
    {
      "ipa": "\\ˌpiː.ˌpiː.ˈbiː\\",
      "raw_tags": [
        "Royaume-Uni"
      ]
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "ppb"
}

{
  "categories": [
    "Lemmes en anglais",
    "Noms communs en anglais",
    "Sigles en anglais",
    "Unités de mesure en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "(Sigle) Sigle de parts per billion (« partie par milliard »). Il est à noter que billion en anglais est milliard en français."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "notes": [
    "Le National Institute of Standards and Technology des États-Unis recommande de ne pas utiliser ppm, ppb, ppt, etc."
  ],
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "ppm"
    },
    {
      "word": "ppt"
    },
    {
      "word": "ppq"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Partie par milliard."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˌpi.ˌpi.ˈbi\\",
      "raw_tags": [
        "États-Unis"
      ]
    },
    {
      "ipa": "\\ˌpiː.ˌpiː.ˈbiː\\",
      "raw_tags": [
        "Royaume-Uni"
      ]
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "ppb"
}