"jam penny" meaning in English

{
  "forms": [
    {
      "form": "jam pennies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "jam penny (plural jam pennies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English 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": "topical",
          "langcode": "en",
          "name": "Sandwiches",
          "orig": "en:Sandwiches",
          "parents": [
            "Foods",
            "Eating",
            "Food and drink",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Jam pennies were reportedly a favourite food of Queen Elizabeth II.",
          "type": "example"
        }
      ],
      "glosses": [
        "A small circular jam sandwich."
      ],
      "id": "en-jam_penny-en-noun-I9ec0aZu",
      "links": [
        [
          "circular",
          "circular"
        ],
        [
          "jam",
          "jam"
        ],
        [
          "sandwich",
          "sandwich"
        ]
      ],
      "raw_glosses": [
        "(UK) A small circular jam sandwich."
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "jam penny"
}

{
  "forms": [
    {
      "form": "jam pennies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "jam penny (plural jam pennies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Sandwiches"
      ],
      "examples": [
        {
          "text": "Jam pennies were reportedly a favourite food of Queen Elizabeth II.",
          "type": "example"
        }
      ],
      "glosses": [
        "A small circular jam sandwich."
      ],
      "links": [
        [
          "circular",
          "circular"
        ],
        [
          "jam",
          "jam"
        ],
        [
          "sandwich",
          "sandwich"
        ]
      ],
      "raw_glosses": [
        "(UK) A small circular jam sandwich."
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "jam penny"
}