"phenocrystal" meaning in English

{
  "forms": [
    {
      "form": "phenocrystals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "phenocrystal (plural phenocrystals)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "2015 October 13, “A Human Deciduous Tooth and New 40Ar/39Ar Dating Results from the Middle Pleistocene Archaeological Site of Isernia La Pineta, Southern Italy”, in PLOS ONE, →DOI",
          "text": "Due to the large grain sizes of pumice (up to 2 mm) and phenocrystals a relatively proximal source of tephra U4T is proposed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Synonym of phenocryst"
      ],
      "id": "en-phenocrystal-en-noun-2iM01mSC",
      "links": [
        [
          "phenocryst",
          "phenocryst#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "phenocryst"
        }
      ]
    }
  ],
  "word": "phenocrystal"
}

{
  "forms": [
    {
      "form": "phenocrystals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "phenocrystal (plural phenocrystals)",
      "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",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2015 October 13, “A Human Deciduous Tooth and New 40Ar/39Ar Dating Results from the Middle Pleistocene Archaeological Site of Isernia La Pineta, Southern Italy”, in PLOS ONE, →DOI",
          "text": "Due to the large grain sizes of pumice (up to 2 mm) and phenocrystals a relatively proximal source of tephra U4T is proposed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Synonym of phenocryst"
      ],
      "links": [
        [
          "phenocryst",
          "phenocryst#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "phenocryst"
        }
      ]
    }
  ],
  "word": "phenocrystal"
}