"Z's" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "form_of": [
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        "plural of Z"
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  "word": "Z's"
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      "expansion": "Z's pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "extra": "sleep",
          "word": "z's"
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      ],
      "glosses": [
        "Alternative letter-case form of z's (sleep)."
      ],
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      "tags": [
        "alt-of",
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  "word": "Z's"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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    {
      "form_of": [
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          "word": "Z"
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      "glosses": [
        "plural of Z"
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      "tags": [
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  "word": "Z's"
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  "lang_code": "en",
  "pos": "noun",
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        "Alternative letter-case form of z's (sleep)."
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  "word": "Z's"
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