"fresnel" meaning in English

{
  "etymology_text": "For Augustin-Jean Fresnel, French physicist.",
  "forms": [
    {
      "form": "fresnels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fresnel (plural fresnels)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A unit of frequency equal to 10¹² hertz, or one terahertz."
      ],
      "id": "en-fresnel-en-noun-lozr3XXk",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "frequency",
          "frequency"
        ],
        [
          "hertz",
          "hertz"
        ],
        [
          "terahertz",
          "terahertz"
        ]
      ],
      "raw_glosses": [
        "(physics) A unit of frequency equal to 10¹² hertz, or one terahertz."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    },
    {
      "categories": [
        {
          "_dis": "23 77",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "14 86",
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "21 79",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A Fresnel lens or a light feature using such a lens"
      ],
      "id": "en-fresnel-en-noun-YlpD5Qjp",
      "links": [
        [
          "Fresnel lens",
          "Fresnel lens"
        ]
      ]
    }
  ],
  "wikipedia": [
    "Augustin-Jean Fresnel"
  ],
  "word": "fresnel"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English entries with language name categories using raw markup",
    "English eponyms",
    "English lemmas",
    "English nouns",
    "Pages with 1 entry"
  ],
  "etymology_text": "For Augustin-Jean Fresnel, French physicist.",
  "forms": [
    {
      "form": "fresnels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fresnel (plural fresnels)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Physics"
      ],
      "glosses": [
        "A unit of frequency equal to 10¹² hertz, or one terahertz."
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "frequency",
          "frequency"
        ],
        [
          "hertz",
          "hertz"
        ],
        [
          "terahertz",
          "terahertz"
        ]
      ],
      "raw_glosses": [
        "(physics) A unit of frequency equal to 10¹² hertz, or one terahertz."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    },
    {
      "glosses": [
        "A Fresnel lens or a light feature using such a lens"
      ],
      "links": [
        [
          "Fresnel lens",
          "Fresnel lens"
        ]
      ]
    }
  ],
  "wikipedia": [
    "Augustin-Jean Fresnel"
  ],
  "word": "fresnel"
}