"azoic rock" meaning in English

{
  "forms": [
    {
      "form": "azoic rocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "azoic rock (plural azoic rocks)",
      "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": "Rocks",
          "orig": "en:Rocks",
          "parents": [
            "Geology",
            "Natural materials",
            "Earth sciences",
            "Materials",
            "Nature",
            "Sciences",
            "Manufacturing",
            "All topics",
            "Human activity",
            "Fundamental",
            "Human behaviour",
            "Human"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "primeval rock formed during the Hadean and devoid of any fossil"
      ],
      "id": "en-azoic_rock-en-noun-OtCvvdJ0",
      "links": [
        [
          "Hadean",
          "Hadean"
        ],
        [
          "fossil",
          "fossil"
        ]
      ],
      "raw_glosses": [
        "(dated) primeval rock formed during the Hadean and devoid of any fossil"
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "word": "azoic rock"
}

{
  "forms": [
    {
      "form": "azoic rocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "azoic rock (plural azoic rocks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Rocks"
      ],
      "glosses": [
        "primeval rock formed during the Hadean and devoid of any fossil"
      ],
      "links": [
        [
          "Hadean",
          "Hadean"
        ],
        [
          "fossil",
          "fossil"
        ]
      ],
      "raw_glosses": [
        "(dated) primeval rock formed during the Hadean and devoid of any fossil"
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "word": "azoic rock"
}