"phthanite" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "φθάνω",
        "4": "",
        "5": "to come first"
      },
      "expansion": "Ancient Greek φθάνω (phthánō, “to come first”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek φθάνω (phthánō, “to come first”).",
  "forms": [
    {
      "form": "phthanites",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
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      "expansion": "phthanite (countable and uncountable, plural phthanites)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
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          "langcode": "en",
          "name": "Minerals",
          "orig": "en:Minerals",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "chert"
      ],
      "id": "en-phthanite-en-noun-DYBcLuI4",
      "links": [
        [
          "mineralogy",
          "mineralogy"
        ],
        [
          "chert",
          "chert"
        ]
      ],
      "raw_glosses": [
        "(mineralogy) chert"
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "geography",
        "geology",
        "mineralogy",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "phthanite"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "φθάνω",
        "4": "",
        "5": "to come first"
      },
      "expansion": "Ancient Greek φθάνω (phthánō, “to come first”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek φθάνω (phthánō, “to come first”).",
  "forms": [
    {
      "form": "phthanites",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
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      "expansion": "phthanite (countable and uncountable, plural phthanites)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
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        "English uncountable nouns",
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        "en:Minerals"
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      "glosses": [
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      "links": [
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          "mineralogy",
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          "chert",
          "chert"
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        "(mineralogy) chert"
      ],
      "tags": [
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      "topics": [
        "chemistry",
        "geography",
        "geology",
        "mineralogy",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "phthanite"
}