"mouche sèche" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en allemand",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de mouche et de sèche."
  ],
  "forms": [
    {
      "form": "mouches sèches",
      "tags": [
        "plural"
      ]
    }
  ],
  "hyponyms": [
    {
      "word": "palmer"
    },
    {
      "word": "peute"
    },
    {
      "word": "sedge"
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français de la pêche à la mouche",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Mouche artificielle imitant un insecte flottant en surface."
      ],
      "id": "fr-mouche_sèche-fr-noun-E4cJsfcb",
      "raw_tags": [
        "Pêche à la mouche"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\muʃ sɛʃ\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Allemand",
      "lang_code": "de",
      "word": "Trockenfliege"
    }
  ],
  "word": "mouche sèche"
}

{
  "categories": [
    "Locutions nominales en français",
    "Traductions en allemand",
    "français"
  ],
  "etymology_texts": [
    "Composé de mouche et de sèche."
  ],
  "forms": [
    {
      "form": "mouches sèches",
      "tags": [
        "plural"
      ]
    }
  ],
  "hyponyms": [
    {
      "word": "palmer"
    },
    {
      "word": "peute"
    },
    {
      "word": "sedge"
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Lexique en français de la pêche à la mouche"
      ],
      "glosses": [
        "Mouche artificielle imitant un insecte flottant en surface."
      ],
      "raw_tags": [
        "Pêche à la mouche"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\muʃ sɛʃ\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Allemand",
      "lang_code": "de",
      "word": "Trockenfliege"
    }
  ],
  "word": "mouche sèche"
}