"sidestream" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "side",
        "3": "stream"
      },
      "expansion": "side + stream",
      "name": "compound"
    }
  ],
  "etymology_text": "From side + stream.",
  "forms": [
    {
      "form": "sidestreams",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "sidestream (plural sidestreams)",
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  "lang_code": "en",
  "pos": "noun",
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          "kind": "other",
          "name": "English entries with incorrect language header",
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          "langcode": "en",
          "name": "Chemistry",
          "orig": "en:Chemistry",
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          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "sidestream smoke"
        }
      ],
      "glosses": [
        "A stream of fluid taken from an intermediate point in a process such as distillation."
      ],
      "id": "en-sidestream-en-noun-qAgvmSQ7",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "stream",
          "stream"
        ],
        [
          "fluid",
          "fluid"
        ],
        [
          "distillation",
          "distillation"
        ]
      ],
      "raw_glosses": [
        "(chemistry) A stream of fluid taken from an intermediate point in a process such as distillation."
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "sidestream"
}

{
  "derived": [
    {
      "word": "sidestream smoke"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "side",
        "3": "stream"
      },
      "expansion": "side + stream",
      "name": "compound"
    }
  ],
  "etymology_text": "From side + stream.",
  "forms": [
    {
      "form": "sidestreams",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sidestream (plural sidestreams)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A stream of fluid taken from an intermediate point in a process such as distillation."
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "stream",
          "stream"
        ],
        [
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        ],
        [
          "distillation",
          "distillation"
        ]
      ],
      "raw_glosses": [
        "(chemistry) A stream of fluid taken from an intermediate point in a process such as distillation."
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "sidestream"
}