"écrevisse signal" meaning in French

{
  "forms": [
    {
      "form": "écrevisses signal",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "+first"
      },
      "expansion": "écrevisse signal f (plural écrevisses signal)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "fr",
          "name": "Astacideans",
          "orig": "fr:Astacideans",
          "parents": [
            "Crustaceans",
            "Decapods",
            "Arthropods",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "signal crayfish (Pacifastacus leniusculus)"
      ],
      "id": "en-écrevisse_signal-fr-noun-EpQ3am0u",
      "links": [
        [
          "signal crayfish",
          "signal crayfish"
        ]
      ],
      "tags": [
        "feminine"
      ],
      "wikipedia": [
        "fr:écrevisse signal"
      ]
    }
  ],
  "word": "écrevisse signal"
}

{
  "forms": [
    {
      "form": "écrevisses signal",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "+first"
      },
      "expansion": "écrevisse signal f (plural écrevisses signal)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Entries using missing taxonomic name (species)",
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Astacideans"
      ],
      "glosses": [
        "signal crayfish (Pacifastacus leniusculus)"
      ],
      "links": [
        [
          "signal crayfish",
          "signal crayfish"
        ]
      ],
      "tags": [
        "feminine"
      ],
      "wikipedia": [
        "fr:écrevisse signal"
      ]
    }
  ],
  "word": "écrevisse signal"
}