"provitamines" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de noms communs en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "provitamine",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en français",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              11,
              23
            ]
          ],
          "ref": "Jean-Marie Bourre, La Chrono-Alimentation du cerveau, 2016",
          "text": "Ainsi, les provitamines D (stérols, dont le cholestérol) peuvent être converties en vitamine D par la peau sous l’effet des rayons UV."
        }
      ],
      "form_of": [
        {
          "word": "provitamine"
        }
      ],
      "glosses": [
        "Pluriel de provitamine."
      ],
      "id": "fr-provitamines-fr-noun-rxV4mWDl"
    }
  ],
  "sounds": [
    {
      "ipa": "\\pʁo.vi.ta.min\\"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "provitamines"
}

{
  "categories": [
    "Formes de noms communs en français",
    "français"
  ],
  "forms": [
    {
      "form": "provitamine",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "categories": [
        "Exemples en français"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              11,
              23
            ]
          ],
          "ref": "Jean-Marie Bourre, La Chrono-Alimentation du cerveau, 2016",
          "text": "Ainsi, les provitamines D (stérols, dont le cholestérol) peuvent être converties en vitamine D par la peau sous l’effet des rayons UV."
        }
      ],
      "form_of": [
        {
          "word": "provitamine"
        }
      ],
      "glosses": [
        "Pluriel de provitamine."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pʁo.vi.ta.min\\"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "provitamines"
}