"delta decay" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A second-order measure of derivative price sensitivity, expressed as the instantaneous rate of change of delta with respect to time."
      ],
      "hypernyms": [
        {
          "english": "includes list of coordinate terms",
          "sense": "measure of derivative price sensitivity",
          "word": "Greeks"
        }
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      "id": "en-delta_decay-en-noun-PrbohyUf",
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          "second-order",
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        [
          "delta",
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      "raw_glosses": [
        "(finance) A second-order measure of derivative price sensitivity, expressed as the instantaneous rate of change of delta with respect to time."
      ],
      "synonyms": [
        {
          "word": "charm"
        },
        {
          "word": "DdeltaDtime"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "business",
        "finance"
      ]
    }
  ],
  "word": "delta decay"
}

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      "sense": "measure of derivative price sensitivity",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A second-order measure of derivative price sensitivity, expressed as the instantaneous rate of change of delta with respect to time."
      ],
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          "second-order",
          "second-order"
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        [
          "delta",
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        "(finance) A second-order measure of derivative price sensitivity, expressed as the instantaneous rate of change of delta with respect to time."
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        "business",
        "finance"
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  "synonyms": [
    {
      "word": "charm"
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    {
      "word": "DdeltaDtime"
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  ],
  "word": "delta decay"
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