"flow variable" meaning in English

{
  "forms": [
    {
      "form": "flow variables",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flow variable (plural flow variables)",
      "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": "topical",
          "langcode": "en",
          "name": "Accounting",
          "orig": "en:Accounting",
          "parents": [
            "Finance",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Economics",
          "orig": "en:Economics",
          "parents": [
            "Social sciences",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "stock variable"
        }
      ],
      "glosses": [
        "A variable whose value depends on a period of time rather than an instant, example being the gross domestic product."
      ],
      "id": "en-flow_variable-en-noun-D3gN86iC",
      "links": [
        [
          "economics",
          "economics"
        ],
        [
          "accounting",
          "accounting#Noun"
        ],
        [
          "instant",
          "instant"
        ]
      ],
      "raw_glosses": [
        "(economics, accounting) A variable whose value depends on a period of time rather than an instant, example being the gross domestic product."
      ],
      "topics": [
        "accounting",
        "business",
        "economics",
        "finance",
        "science",
        "sciences"
      ],
      "wikipedia": [
        "Stock and flow"
      ]
    }
  ],
  "word": "flow variable"
}

{
  "coordinate_terms": [
    {
      "word": "stock variable"
    }
  ],
  "forms": [
    {
      "form": "flow variables",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flow variable (plural flow variables)",
      "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",
        "en:Accounting",
        "en:Economics"
      ],
      "glosses": [
        "A variable whose value depends on a period of time rather than an instant, example being the gross domestic product."
      ],
      "links": [
        [
          "economics",
          "economics"
        ],
        [
          "accounting",
          "accounting#Noun"
        ],
        [
          "instant",
          "instant"
        ]
      ],
      "raw_glosses": [
        "(economics, accounting) A variable whose value depends on a period of time rather than an instant, example being the gross domestic product."
      ],
      "topics": [
        "accounting",
        "business",
        "economics",
        "finance",
        "science",
        "sciences"
      ],
      "wikipedia": [
        "Stock and flow"
      ]
    }
  ],
  "word": "flow variable"
}