"lava tree" meaning in English

{
  "forms": [
    {
      "form": "lava trees",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lava tree (plural lava trees)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "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"
        }
      ],
      "glosses": [
        "A hardened stone pillar or hollow mold left behind when molten lava flows around a tree trunk, cools into a solid shell, and the original tree burns away."
      ],
      "id": "en-lava_tree-en-noun-xR0iGDJF",
      "related": [
        {
          "word": "lavacast"
        }
      ]
    }
  ],
  "word": "lava tree"
}

{
  "forms": [
    {
      "form": "lava trees",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lava tree (plural lava trees)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "lavacast"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A hardened stone pillar or hollow mold left behind when molten lava flows around a tree trunk, cools into a solid shell, and the original tree burns away."
      ]
    }
  ],
  "word": "lava tree"
}