"pilot bread" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "pilot",
        "3": "pilots"
      },
      "expansion": "pilots",
      "name": "l"
    }
  ],
  "etymology_text": "So named because of its original popularity with seafarers (pilots) as a long-lasting staple food.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "pilot bread (uncountable)",
      "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": "topical",
          "langcode": "en",
          "name": "Foods",
          "orig": "en:Foods",
          "parents": [
            "Eating",
            "Food and drink",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "hardtack"
      ],
      "id": "en-pilot_bread-en-noun-2QWaXo3l",
      "links": [
        [
          "hardtack",
          "hardtack"
        ]
      ],
      "synonyms": [
        {
          "word": "pilot biscuit"
        },
        {
          "word": "sea biscuit"
        },
        {
          "word": "sea bread"
        },
        {
          "word": "ship bread"
        },
        {
          "word": "ship's biscuit"
        },
        {
          "word": "ship biscuit"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "pilot bread"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "pilot",
        "3": "pilots"
      },
      "expansion": "pilots",
      "name": "l"
    }
  ],
  "etymology_text": "So named because of its original popularity with seafarers (pilots) as a long-lasting staple food.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "pilot bread (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "en:Foods"
      ],
      "glosses": [
        "hardtack"
      ],
      "links": [
        [
          "hardtack",
          "hardtack"
        ]
      ],
      "synonyms": [
        {
          "word": "pilot biscuit"
        },
        {
          "word": "sea biscuit"
        },
        {
          "word": "sea bread"
        },
        {
          "word": "ship bread"
        },
        {
          "word": "ship's biscuit"
        },
        {
          "word": "ship biscuit"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "pilot bread"
}