"duck curve" meaning in English

{
  "etymology_text": "Named for its resemblance to the silhouette of a duck.",
  "forms": [
    {
      "form": "duck curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "duck curve (plural duck curves)",
      "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"
        },
        {
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
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          "source": "w"
        }
      ],
      "glosses": [
        "A graph of power production over the course of a day that shows the timing imbalance between peak demand and renewable energy production."
      ],
      "id": "en-duck_curve-en-noun-COpnl4-s",
      "links": [
        [
          "power",
          "power"
        ],
        [
          "timing",
          "timing"
        ],
        [
          "imbalance",
          "imbalance"
        ],
        [
          "demand",
          "demand"
        ],
        [
          "renewable energy",
          "renewable energy"
        ]
      ],
      "wikipedia": [
        "duck curve"
      ]
    }
  ],
  "word": "duck curve"
}

{
  "etymology_text": "Named for its resemblance to the silhouette of a duck.",
  "forms": [
    {
      "form": "duck curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "duck curve (plural duck curves)",
      "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",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A graph of power production over the course of a day that shows the timing imbalance between peak demand and renewable energy production."
      ],
      "links": [
        [
          "power",
          "power"
        ],
        [
          "timing",
          "timing"
        ],
        [
          "imbalance",
          "imbalance"
        ],
        [
          "demand",
          "demand"
        ],
        [
          "renewable energy",
          "renewable energy"
        ]
      ],
      "wikipedia": [
        "duck curve"
      ]
    }
  ],
  "word": "duck curve"
}