"lead pencil" meaning in English

{
  "etymology_text": "Graphite was once thought to be a form of lead.",
  "forms": [
    {
      "form": "lead pencils",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lead pencil (plural lead pencils)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Bangladeshi English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Carbon",
          "orig": "en:Carbon",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Writing instruments",
          "orig": "en:Writing instruments",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A pencil with a core made of graphite."
      ],
      "id": "en-lead_pencil-en-noun-cdDhy76w",
      "links": [
        [
          "core",
          "core"
        ],
        [
          "graphite",
          "graphite"
        ]
      ],
      "raw_glosses": [
        "(Bangladesh) A pencil with a core made of graphite."
      ],
      "synonyms": [
        {
          "word": "mechanical pencil"
        }
      ],
      "tags": [
        "Bangladesh"
      ]
    }
  ],
  "word": "lead pencil"
}

{
  "etymology_text": "Graphite was once thought to be a form of lead.",
  "forms": [
    {
      "form": "lead pencils",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lead pencil (plural lead pencils)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Bangladeshi English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Carbon",
        "en:Writing instruments"
      ],
      "glosses": [
        "A pencil with a core made of graphite."
      ],
      "links": [
        [
          "core",
          "core"
        ],
        [
          "graphite",
          "graphite"
        ]
      ],
      "raw_glosses": [
        "(Bangladesh) A pencil with a core made of graphite."
      ],
      "synonyms": [
        {
          "word": "mechanical pencil"
        }
      ],
      "tags": [
        "Bangladesh"
      ]
    }
  ],
  "word": "lead pencil"
}