"phononic crystal" meaning in English

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  "forms": [
    {
      "form": "phononic crystals",
      "tags": [
        "plural"
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  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "glosses": [
        "A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing."
      ],
      "id": "en-phononic_crystal-en-noun-ZgxEgfyi",
      "links": [
        [
          "periodic",
          "periodic"
        ],
        [
          "nanostructure",
          "nanostructure"
        ],
        [
          "bandgap",
          "bandgap"
        ]
      ]
    }
  ],
  "word": "phononic crystal"
}

{
  "forms": [
    {
      "form": "phononic crystals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "phononic crystal (plural phononic crystals)",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing."
      ],
      "links": [
        [
          "periodic",
          "periodic"
        ],
        [
          "nanostructure",
          "nanostructure"
        ],
        [
          "bandgap",
          "bandgap"
        ]
      ]
    }
  ],
  "word": "phononic crystal"
}