"single crystal" meaning in English

{
  "forms": [
    {
      "form": "single crystals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "single crystal (plural single crystals)",
      "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"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Crystal",
          "orig": "en:Crystal",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Materials",
          "orig": "en:Materials",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A material formed from by the growth of a crystal nucleus without secondary nucleation or impingement on other crystals; a regular three-dimensional structure extends throughout the material"
      ],
      "id": "en-single_crystal-en-noun-SuLcfjmU",
      "links": [
        [
          "nucleus",
          "nucleus"
        ],
        [
          "secondary",
          "secondary"
        ],
        [
          "nucleation",
          "nucleation"
        ],
        [
          "impingement",
          "impingement"
        ]
      ],
      "synonyms": [
        {
          "word": "monocrystal"
        }
      ]
    }
  ],
  "word": "single crystal"
}

{
  "forms": [
    {
      "form": "single crystals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "single crystal (plural single crystals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "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",
        "en:Crystal",
        "en:Materials"
      ],
      "glosses": [
        "A material formed from by the growth of a crystal nucleus without secondary nucleation or impingement on other crystals; a regular three-dimensional structure extends throughout the material"
      ],
      "links": [
        [
          "nucleus",
          "nucleus"
        ],
        [
          "secondary",
          "secondary"
        ],
        [
          "nucleation",
          "nucleation"
        ],
        [
          "impingement",
          "impingement"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "monocrystal"
    }
  ],
  "word": "single crystal"
}