"mobile phase" meaning in English

{
  "forms": [
    {
      "form": "mobile phases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mobile phase (plural mobile phases)",
      "name": "en-noun"
    }
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  "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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          "langcode": "en",
          "name": "Chemistry",
          "orig": "en:Chemistry",
          "parents": [
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            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "The fluid (liquid or gas) that flows through a chromatography system, moving the materials to be separated at different rates over the stationary phase"
      ],
      "id": "en-mobile_phase-en-noun-LRIOlArP",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "chromatography",
          "chromatography"
        ],
        [
          "stationary phase",
          "stationary phase"
        ]
      ],
      "raw_glosses": [
        "(chemistry) The fluid (liquid or gas) that flows through a chromatography system, moving the materials to be separated at different rates over the stationary phase"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "fluid that flows through a chromatograhy system",
          "word": "liikkuva faasi"
        }
      ]
    }
  ],
  "word": "mobile phase"
}

{
  "forms": [
    {
      "form": "mobile phases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mobile phase (plural mobile phases)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English countable nouns",
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        "en:Chemistry"
      ],
      "glosses": [
        "The fluid (liquid or gas) that flows through a chromatography system, moving the materials to be separated at different rates over the stationary phase"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "chromatography",
          "chromatography"
        ],
        [
          "stationary phase",
          "stationary phase"
        ]
      ],
      "raw_glosses": [
        "(chemistry) The fluid (liquid or gas) that flows through a chromatography system, moving the materials to be separated at different rates over the stationary phase"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "fluid that flows through a chromatograhy system",
      "word": "liikkuva faasi"
    }
  ],
  "word": "mobile phase"
}