"fenestron" meaning in English

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      "expansion": "French fenestron (“small window”)",
      "name": "bor"
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        "2": "la",
        "3": "fenestra",
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      "expansion": "Latin fenestra (“window”)",
      "name": "uder"
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  "etymology_text": "Borrowed from French fenestron (“small window”), ultimately from Latin fenestra (“window”).",
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      "form": "fenestrons",
      "tags": [
        "plural"
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      "glosses": [
        "A protected tail rotor of a helicopter, operating like a ducted fan."
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          "ducted fan",
          "ducted fan"
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        "(aviation) A protected tail rotor of a helicopter, operating like a ducted fan."
      ],
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        "aeronautics",
        "aerospace",
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        "business",
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  "word": "fenestron"
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        "A protected tail rotor of a helicopter, operating like a ducted fan."
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        "(aviation) A protected tail rotor of a helicopter, operating like a ducted fan."
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