"ghost peak" meaning in English

{
  "forms": [
    {
      "form": "ghost peaks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ghost peak (plural ghost peaks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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      ],
      "glosses": [
        "a peak at an unexpected position (or time), due to e.g. contamination of the sample or from the previous analysis (if one of the substances had a retention time longer than the runtime)"
      ],
      "id": "en-ghost_peak-en-noun-0Qx8I-mJ",
      "links": [
        [
          "peak",
          "peak"
        ],
        [
          "unexpected",
          "unexpected"
        ]
      ],
      "raw_glosses": [
        "(chromatography) a peak at an unexpected position (or time), due to e.g. contamination of the sample or from the previous analysis (if one of the substances had a retention time longer than the runtime)"
      ],
      "topics": [
        "chemistry",
        "chromatography",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "ghost peak"
}

{
  "forms": [
    {
      "form": "ghost peaks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ghost peak (plural ghost peaks)",
      "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",
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        "Pages with 1 entry",
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      ],
      "glosses": [
        "a peak at an unexpected position (or time), due to e.g. contamination of the sample or from the previous analysis (if one of the substances had a retention time longer than the runtime)"
      ],
      "links": [
        [
          "peak",
          "peak"
        ],
        [
          "unexpected",
          "unexpected"
        ]
      ],
      "raw_glosses": [
        "(chromatography) a peak at an unexpected position (or time), due to e.g. contamination of the sample or from the previous analysis (if one of the substances had a retention time longer than the runtime)"
      ],
      "topics": [
        "chemistry",
        "chromatography",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "ghost peak"
}