"tonnfhad" meaning in Irish

{
  "etymology_text": "From tonn (“wave”) + fad (“length”).",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "noun",
        "g": "m"
      },
      "expansion": "tonnfhad m",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Irish 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"
        }
      ],
      "glosses": [
        "wavelength"
      ],
      "id": "en-tonnfhad-ga-noun-y~czUJQb",
      "links": [
        [
          "wavelength",
          "wavelength"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "tonnfhad"
}

{
  "etymology_text": "From tonn (“wave”) + fad (“length”).",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "noun",
        "g": "m"
      },
      "expansion": "tonnfhad m",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Irish entries with incorrect language header",
        "Irish lemmas",
        "Irish masculine nouns",
        "Irish nouns",
        "Pages with 1 entry"
      ],
      "glosses": [
        "wavelength"
      ],
      "links": [
        [
          "wavelength",
          "wavelength"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "tonnfhad"
}