"adder fly" meaning in English

{
  "forms": [
    {
      "form": "adder flies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "adder fly (plural adder flies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Dragonflies and damselflies",
          "orig": "en:Dragonflies and damselflies",
          "parents": [
            "Insects",
            "Arthropods",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A dragonfly."
      ],
      "id": "en-adder_fly-en-noun-08-yl3Cx",
      "links": [
        [
          "dragonfly",
          "dragonfly"
        ]
      ],
      "raw_glosses": [
        "(archaic) A dragonfly."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "adder fly"
}

{
  "forms": [
    {
      "form": "adder flies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "adder fly (plural adder flies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with archaic senses",
        "English terms with non-redundant non-automated sortkeys",
        "en:Dragonflies and damselflies"
      ],
      "glosses": [
        "A dragonfly."
      ],
      "links": [
        [
          "dragonfly",
          "dragonfly"
        ]
      ],
      "raw_glosses": [
        "(archaic) A dragonfly."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "adder fly"
}