"dérailleur" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "dérailler",
        "3": "-eur"
      },
      "expansion": "dérailler + -eur",
      "name": "af"
    }
  ],
  "etymology_text": "From dérailler + -eur.",
  "forms": [
    {
      "form": "dérailleurs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "dérailleur m (plural dérailleurs)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French terms suffixed with -eur",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Bicycle parts",
          "orig": "fr:Bicycle parts",
          "parents": [
            "Cycling",
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "derailleur (the mechanism on a bicycle used to move the chain from one sprocket (gear) to another)"
      ],
      "id": "en-dérailleur-fr-noun-ailYTL3P",
      "links": [
        [
          "derailleur",
          "derailleur"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/de.ʁa.jœʁ/"
    },
    {
      "audio": "Fr-Paris--dérailleur.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/50/Fr-Paris--d%C3%A9railleur.ogg/Fr-Paris--d%C3%A9railleur.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/50/Fr-Paris--d%C3%A9railleur.ogg"
    },
    {
      "audio": "LL-Q150 (fra)-DSwissK-dérailleur.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/97/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/97/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav.ogg"
    },
    {
      "rhymes": "-jœʁ"
    }
  ],
  "word": "dérailleur"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "dérailler",
        "3": "-eur"
      },
      "expansion": "dérailler + -eur",
      "name": "af"
    }
  ],
  "etymology_text": "From dérailler + -eur.",
  "forms": [
    {
      "form": "dérailleurs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "dérailleur m (plural dérailleurs)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French 3-syllable words",
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French nouns",
        "French terms suffixed with -eur",
        "French terms with IPA pronunciation",
        "Pages with 2 entries",
        "Pages with entries",
        "Rhymes:French/jœʁ",
        "Rhymes:French/jœʁ/3 syllables",
        "fr:Bicycle parts"
      ],
      "glosses": [
        "derailleur (the mechanism on a bicycle used to move the chain from one sprocket (gear) to another)"
      ],
      "links": [
        [
          "derailleur",
          "derailleur"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/de.ʁa.jœʁ/"
    },
    {
      "audio": "Fr-Paris--dérailleur.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/50/Fr-Paris--d%C3%A9railleur.ogg/Fr-Paris--d%C3%A9railleur.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/50/Fr-Paris--d%C3%A9railleur.ogg"
    },
    {
      "audio": "LL-Q150 (fra)-DSwissK-dérailleur.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/97/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/97/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav/LL-Q150_%28fra%29-DSwissK-d%C3%A9railleur.wav.ogg"
    },
    {
      "rhymes": "-jœʁ"
    }
  ],
  "word": "dérailleur"
}