"音線" meaning in Japanese

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        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Acoustics",
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            "Applied sciences",
            "Physics",
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            "Fundamental"
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            "Sciences",
            "All topics",
            "Fundamental"
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        }
      ],
      "derived": [
        {
          "english": "ray acoustics",
          "roman": "onsen onkyōgaku",
          "ruby": [
            [
              "音線音響学",
              "おんせんおんきょうがく"
            ]
          ],
          "word": "音線音響学"
        },
        {
          "english": "sound ray diagram, acoustic ray tracing diagram",
          "roman": "onsenzu",
          "ruby": [
            [
              "音線図",
              "おんせんず"
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          ],
          "word": "音線図"
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        "a sound ray, an acoustic ray"
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          "ray",
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          "acoustic",
          "acoustic"
        ]
      ],
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        "(acoustics, physics) a sound ray, an acoustic ray"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "sounds": [
    {
      "other": "おんせん"
    },
    {
      "ipa": "[õ̞ɰ̃sẽ̞ɴ]"
    }
  ],
  "word": "音線"
}

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      "english": "ray acoustics",
      "roman": "onsen onkyōgaku",
      "ruby": [
        [
          "音線音響学",
          "おんせんおんきょうがく"
        ]
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    },
    {
      "english": "sound ray diagram, acoustic ray tracing diagram",
      "roman": "onsenzu",
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          "音線図",
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      "word": "音線図"
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    {
      "form": "音線",
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          "音",
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          "線",
          "せん"
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        ],
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          "ray",
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        ],
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          "acoustic",
          "acoustic"
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        "(acoustics, physics) a sound ray, an acoustic ray"
      ],
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        "physics"
      ]
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  ],
  "sounds": [
    {
      "other": "おんせん"
    },
    {
      "ipa": "[õ̞ɰ̃sẽ̞ɴ]"
    }
  ],
  "word": "音線"
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  "path": [
    "音線"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "音線",
  "trace": ""
}