"nanograms" 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 nano-",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs 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": [
    "Dérivé de gram, avec le préfixe nano-."
  ],
  "forms": [
    {
      "form": "nanogram",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en anglais de la physique",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Anglais des États-Unis",
          "orig": "anglais des États-Unis",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Nanogramme (ng)."
      ],
      "id": "fr-nanograms-en-noun-kzBKgq9g",
      "raw_tags": [
        "États-Unis"
      ],
      "tags": [
        "physical"
      ],
      "topics": [
        "metrology"
      ]
    }
  ],
  "word": "nanograms"
}

{
  "categories": [
    "Dérivations en anglais",
    "Lemmes en anglais",
    "Mots en anglais préfixés avec nano-",
    "Noms communs en anglais",
    "Unités de mesure en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Dérivé de gram, avec le préfixe nano-."
  ],
  "forms": [
    {
      "form": "nanogram",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en anglais de la physique",
        "anglais des États-Unis"
      ],
      "glosses": [
        "Nanogramme (ng)."
      ],
      "raw_tags": [
        "États-Unis"
      ],
      "tags": [
        "physical"
      ],
      "topics": [
        "metrology"
      ]
    }
  ],
  "word": "nanograms"
}