"pi" meaning in Italien

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en italien issus d’un mot en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms des lettres grecques en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Italien",
      "orig": "italien",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du grec ancien πῖ, pĩ."
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en italien",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Pi."
      ],
      "id": "fr-pi-it-noun-NMYC9wzD"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈpi\\"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "pi"
}

{
  "categories": [
    "Lemmes en italien",
    "Mots en italien issus d’un mot en grec ancien",
    "Noms communs en italien",
    "Noms des lettres grecques en italien",
    "italien"
  ],
  "etymology_texts": [
    "Du grec ancien πῖ, pĩ."
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en italien"
      ],
      "glosses": [
        "Pi."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈpi\\"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "pi"
}