"octachord" meaning in English

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  "etymology_text": "Ancient Greek",
  "forms": [
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      "form": "octachords",
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        "plural"
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      "glosses": [
        "A musical instrument with eight strings."
      ],
      "id": "en-octachord-en-noun-ucsveg1f",
      "links": [
        [
          "musical instrument",
          "musical instrument"
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        [
          "string",
          "string"
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    {
      "glosses": [
        "A musical system of eight tones."
      ],
      "id": "en-octachord-en-noun-faBrCqkE",
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          "tone",
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  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "octochord"
    }
  ],
  "word": "octachord"
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  "etymology_text": "Ancient Greek",
  "forms": [
    {
      "form": "octachords",
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        "A musical instrument with eight strings."
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        "A musical system of eight tones."
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  "synonyms": [
    {
      "word": "octochord"
    }
  ],
  "word": "octachord"
}