"BF%" 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": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Abréviation de body fat percentage."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en anglais à traduire",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en anglais de la médecine",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Cailah Brock, Design Your Body: Your Guide to Cutting Through the Fat, 2014",
          "text": "It is fairly easy to find your BF%, most gyms have a handheld device with silver handles that you hold for a few seconds and it shows a percentage of you that is all fat (some devices are also weight scales and ask you to stand on them)."
        }
      ],
      "glosses": [
        "IMG, indice de masse grasse."
      ],
      "id": "fr-BF%-en-noun-UtGAEOsX",
      "topics": [
        "medicine"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "body fat percentage"
    }
  ],
  "word": "BF%"
}

{
  "categories": [
    "Lemmes en anglais",
    "Noms communs en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Abréviation de body fat percentage."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Exemples en anglais",
        "Exemples en anglais à traduire",
        "Lexique en anglais de la médecine"
      ],
      "examples": [
        {
          "ref": "Cailah Brock, Design Your Body: Your Guide to Cutting Through the Fat, 2014",
          "text": "It is fairly easy to find your BF%, most gyms have a handheld device with silver handles that you hold for a few seconds and it shows a percentage of you that is all fat (some devices are also weight scales and ask you to stand on them)."
        }
      ],
      "glosses": [
        "IMG, indice de masse grasse."
      ],
      "topics": [
        "medicine"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "body fat percentage"
    }
  ],
  "word": "BF%"
}