"pressure gradient" meaning in English

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    {
      "form": "pressure gradients",
      "tags": [
        "plural"
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      "expansion": "pressure gradient (plural pressure gradients)",
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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",
          "parents": [
            "Entries with incorrect language header",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Weather",
          "orig": "en:Weather",
          "parents": [
            "Atmosphere",
            "Nature",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "The rate of decrease (gradient) of pressure in space at a fixed time. The term is sometimes used to denote simply the magnitude of the gradient of the pressure field."
      ],
      "id": "en-pressure_gradient-en-noun-dVl3KKA0",
      "links": [
        [
          "decrease",
          "decrease"
        ],
        [
          "gradient",
          "gradient"
        ],
        [
          "pressure",
          "pressure"
        ],
        [
          "magnitude",
          "magnitude"
        ],
        [
          "pressure field",
          "pressure field"
        ]
      ]
    }
  ],
  "word": "pressure gradient"
}

{
  "forms": [
    {
      "form": "pressure gradients",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pressure gradient (plural pressure gradients)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
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        "en:Weather"
      ],
      "glosses": [
        "The rate of decrease (gradient) of pressure in space at a fixed time. The term is sometimes used to denote simply the magnitude of the gradient of the pressure field."
      ],
      "links": [
        [
          "decrease",
          "decrease"
        ],
        [
          "gradient",
          "gradient"
        ],
        [
          "pressure",
          "pressure"
        ],
        [
          "magnitude",
          "magnitude"
        ],
        [
          "pressure field",
          "pressure field"
        ]
      ]
    }
  ],
  "word": "pressure gradient"
}