"head-bolt heater" meaning in English

{
  "forms": [
    {
      "form": "head-bolt heaters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "head-bolt heater (plural head-bolt heaters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "headbolt heater"
        }
      ],
      "categories": [
        {
          "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"
        }
      ],
      "examples": [
        {
          "ref": "1948 January, “Here's News”, in Popular Mechanics, volume 89, number 1, page 98:",
          "text": "Head-bolt heater makes motors start easily in sub-zero weather by warming the water in the block to driving temperature.",
          "type": "quote"
        },
        {
          "ref": "2011, Gerald Anderson, Murder Under the Loon, →ISBN, page 61:",
          "text": "Nevertheless, she professed genuine interest in the fact that his Oldsmobile always started now that he had put in a tank heater, which was so much more efficient than that old head-bolt heater system.",
          "type": "quote"
        },
        {
          "ref": "2012, Peter Bowen, Specimen Song, →ISBN:",
          "text": "He, like everyone else here, had a head-bolt heater plugged into the engine to keep it warm and some heat tape wrapped around the battery.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of headbolt heater"
      ],
      "id": "en-head-bolt_heater-en-noun-zhtFy5FI",
      "links": [
        [
          "headbolt heater",
          "headbolt heater#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "head-bolt heater"
}

{
  "forms": [
    {
      "form": "head-bolt heaters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "head-bolt heater (plural head-bolt heaters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "headbolt heater"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1948 January, “Here's News”, in Popular Mechanics, volume 89, number 1, page 98:",
          "text": "Head-bolt heater makes motors start easily in sub-zero weather by warming the water in the block to driving temperature.",
          "type": "quote"
        },
        {
          "ref": "2011, Gerald Anderson, Murder Under the Loon, →ISBN, page 61:",
          "text": "Nevertheless, she professed genuine interest in the fact that his Oldsmobile always started now that he had put in a tank heater, which was so much more efficient than that old head-bolt heater system.",
          "type": "quote"
        },
        {
          "ref": "2012, Peter Bowen, Specimen Song, →ISBN:",
          "text": "He, like everyone else here, had a head-bolt heater plugged into the engine to keep it warm and some heat tape wrapped around the battery.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of headbolt heater"
      ],
      "links": [
        [
          "headbolt heater",
          "headbolt heater#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "head-bolt heater"
}