"円周率" meaning in Japanese

{
  "etymology_templates": [
    {
      "args": {
        "1": "ja",
        "2": "円周",
        "3": "率",
        "t1": "circumference",
        "t2": "ratio",
        "tr1": "enshū",
        "tr2": "-ritsu"
      },
      "expansion": "円周 (enshū, “circumference”) + 率 (-ritsu, “ratio”)",
      "name": "suf"
    }
  ],
  "etymology_text": "From 円周 (enshū, “circumference”) + 率 (-ritsu, “ratio”).",
  "forms": [
    {
      "form": "円周率",
      "ruby": [
        [
          "円",
          "えん"
        ],
        [
          "周",
          "しゅう"
        ],
        [
          "率",
          "りつ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "enshūritsu",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "wensiuritu",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ゑんしうりつ",
      "roman": "wensiuritu",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "えんしゅうりつ",
        "hhira": "ゑんしうりつ"
      },
      "expansion": "円(えん)周(しゅう)率(りつ) • (enshūritsu) ^(←ゑんしうりつ (wensiuritu)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
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          "name": "Japanese terms suffixed with 率",
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          "langcode": "ja",
          "name": "Mathematics",
          "orig": "ja:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
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          "langcode": "ja",
          "name": "Numbers",
          "orig": "ja:Numbers",
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            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "pi"
      ],
      "id": "en-円周率-ja-noun-hbQuFwKH",
      "links": [
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          "mathematics",
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          "pi"
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        "(mathematics) pi"
      ],
      "synonyms": [
        {
          "word": "パイ"
        }
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        "mathematics",
        "sciences"
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      "wikipedia": [
        "ja:円周率"
      ]
    }
  ],
  "sounds": [
    {
      "other": "えんしゅうりつ"
    },
    {
      "ipa": "[ẽ̞ɰ̃ɕɨᵝːɾʲit͡sɨᵝ]"
    }
  ],
  "word": "円周率"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ja",
        "2": "円周",
        "3": "率",
        "t1": "circumference",
        "t2": "ratio",
        "tr1": "enshū",
        "tr2": "-ritsu"
      },
      "expansion": "円周 (enshū, “circumference”) + 率 (-ritsu, “ratio”)",
      "name": "suf"
    }
  ],
  "etymology_text": "From 円周 (enshū, “circumference”) + 率 (-ritsu, “ratio”).",
  "forms": [
    {
      "form": "円周率",
      "ruby": [
        [
          "円",
          "えん"
        ],
        [
          "周",
          "しゅう"
        ],
        [
          "率",
          "りつ"
        ]
      ],
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        "canonical"
      ]
    },
    {
      "form": "enshūritsu",
      "tags": [
        "romanization"
      ]
    },
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      "form": "wensiuritu",
      "tags": [
        "romanization"
      ]
    },
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      "form": "ゑんしうりつ",
      "roman": "wensiuritu",
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        "hiragana",
        "historical"
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  ],
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  "lang_code": "ja",
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        "Japanese terms spelled with fifth grade kanji",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms suffixed with 率",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with three Han script characters",
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        "ja:Numbers"
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      "glosses": [
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          "mathematics"
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          "pi"
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        "(mathematics) pi"
      ],
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        {
          "word": "パイ"
        }
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        "sciences"
      ],
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        "ja:円周率"
      ]
    }
  ],
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    {
      "other": "えんしゅうりつ"
    },
    {
      "ipa": "[ẽ̞ɰ̃ɕɨᵝːɾʲit͡sɨᵝ]"
    }
  ],
  "word": "円周率"
}