"¼ h" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "reference to alloy strength, as in between dead soft and half hard",
          "word": "quarter-hard"
        }
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      "glosses": [
        "Abbreviation of quarter-hard (reference to alloy strength, as in between dead soft and half hard)."
      ],
      "id": "en-¼_h-en-noun-PnSuZy9n",
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          "quarter-hard",
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  "word": "¼ h"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "reference to alloy strength, as in between dead soft and half hard",
          "word": "quarter-hard"
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      "glosses": [
        "Abbreviation of quarter-hard (reference to alloy strength, as in between dead soft and half hard)."
      ],
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        [
          "quarter-hard",
          "quarter-hard#English"
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  "word": "¼ h"
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