"spectral line" meaning in English

{
  "forms": [
    {
      "form": "spectral lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "spectral line (plural spectral lines)",
      "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"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a dark or bright line in an otherwise continuous spectrum caused by the absorption or emission of light, at a single wavelength, by the movement of electrons between energy levels of an atom or molecule"
      ],
      "id": "en-spectral_line-en-noun-DKA8yfAb",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "spectrum",
          "spectrum"
        ],
        [
          "absorption",
          "absorption"
        ],
        [
          "emission",
          "emission"
        ],
        [
          "wavelength",
          "wavelength"
        ],
        [
          "electron",
          "electron"
        ],
        [
          "energy level",
          "energy level"
        ],
        [
          "atom",
          "atom"
        ],
        [
          "molecule",
          "molecule"
        ]
      ],
      "raw_glosses": [
        "(physics) a dark or bright line in an otherwise continuous spectrum caused by the absorption or emission of light, at a single wavelength, by the movement of electrons between energy levels of an atom or molecule"
      ],
      "related": [
        {
          "word": "absorption line"
        },
        {
          "word": "emission line"
        },
        {
          "word": "linebroadening"
        }
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "line on spectrogram",
          "word": "spektriviiva"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "line on spectrogram",
          "tags": [
            "feminine"
          ],
          "word": "Spektrallinie"
        }
      ],
      "wikipedia": [
        "spectral line"
      ]
    }
  ],
  "word": "spectral line"
}

{
  "forms": [
    {
      "form": "spectral lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "spectral line (plural spectral lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "absorption line"
    },
    {
      "word": "emission line"
    },
    {
      "word": "linebroadening"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with German translations",
        "en:Physics"
      ],
      "glosses": [
        "a dark or bright line in an otherwise continuous spectrum caused by the absorption or emission of light, at a single wavelength, by the movement of electrons between energy levels of an atom or molecule"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "spectrum",
          "spectrum"
        ],
        [
          "absorption",
          "absorption"
        ],
        [
          "emission",
          "emission"
        ],
        [
          "wavelength",
          "wavelength"
        ],
        [
          "electron",
          "electron"
        ],
        [
          "energy level",
          "energy level"
        ],
        [
          "atom",
          "atom"
        ],
        [
          "molecule",
          "molecule"
        ]
      ],
      "raw_glosses": [
        "(physics) a dark or bright line in an otherwise continuous spectrum caused by the absorption or emission of light, at a single wavelength, by the movement of electrons between energy levels of an atom or molecule"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "spectral line"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "line on spectrogram",
      "word": "spektriviiva"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "line on spectrogram",
      "tags": [
        "feminine"
      ],
      "word": "Spektrallinie"
    }
  ],
  "word": "spectral line"
}