"dumbbell curve" meaning in English

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        "2": "dumbbell",
        "3": "curve"
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      "expansion": "dumbbell + curve",
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  ],
  "etymology_text": "From dumbbell + curve, since the shape loosely resembles a dumbbell.",
  "forms": [
    {
      "form": "dumbbell curves",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "dumbbell curve (plural dumbbell curves)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "langcode": "en",
          "name": "Mathematics",
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          "source": "w"
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      ],
      "glosses": [
        "Any of a family of closed curves having two lobes; they satisfy the general equation y² = α²(x⁴ - x⁶)."
      ],
      "id": "en-dumbbell_curve-en-noun-ok~UsPqL",
      "links": [
        [
          "mathematics",
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        [
          "lobe",
          "lobe"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Any of a family of closed curves having two lobes; they satisfy the general equation y² = α²(x⁴ - x⁶)."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "dumbbell curve"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "dumbbell",
        "3": "curve"
      },
      "expansion": "dumbbell + curve",
      "name": "com"
    }
  ],
  "etymology_text": "From dumbbell + curve, since the shape loosely resembles a dumbbell.",
  "forms": [
    {
      "form": "dumbbell curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "dumbbell curve (plural dumbbell curves)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "en:Mathematics"
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      "glosses": [
        "Any of a family of closed curves having two lobes; they satisfy the general equation y² = α²(x⁴ - x⁶)."
      ],
      "links": [
        [
          "mathematics",
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        ],
        [
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      "raw_glosses": [
        "(mathematics) Any of a family of closed curves having two lobes; they satisfy the general equation y² = α²(x⁴ - x⁶)."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "dumbbell curve"
}