"στέμματα" meaning in Ancient Greek

{
  "forms": [
    {
      "form": "στέμμᾰτᾰ",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "stémmata",
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        "romanization"
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      "name": "grc-noun form"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "noun",
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          "name": "Ancient Greek entries with incorrect language header",
          "parents": [
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      "form_of": [
        {
          "extra": "stémma",
          "word": "στέμμα"
        }
      ],
      "glosses": [
        "nominative/accusative/vocative plural of στέμμα (stémma)"
      ],
      "id": "en-στέμματα-grc-noun-QsNNzlef",
      "links": [
        [
          "στέμμα",
          "στέμμα#Ancient_Greek"
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      ],
      "tags": [
        "accusative",
        "form-of",
        "nominative",
        "plural",
        "vocative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/stém.ma.ta/"
    },
    {
      "ipa": "/ˈstem.ma.ta/"
    },
    {
      "ipa": "/ˈste.ma.ta/"
    },
    {
      "ipa": "/stém.ma.ta/",
      "note": "5ᵗʰ BCE Attic"
    },
    {
      "ipa": "/ˈstem.ma.ta/",
      "note": "1ˢᵗ CE Egyptian"
    },
    {
      "ipa": "/ˈstem.ma.ta/",
      "note": "4ᵗʰ CE Koine"
    },
    {
      "ipa": "/ˈstem.ma.ta/",
      "note": "10ᵗʰ CE Byzantine"
    },
    {
      "ipa": "/ˈste.ma.ta/",
      "note": "15ᵗʰ CE Constantinopolitan"
    }
  ],
  "word": "στέμματα"
}

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  "pos": "noun",
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      ],
      "links": [
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      "tags": [
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  "sounds": [
    {
      "ipa": "/stém.ma.ta/"
    },
    {
      "ipa": "/ˈstem.ma.ta/"
    },
    {
      "ipa": "/ˈste.ma.ta/"
    },
    {
      "ipa": "/stém.ma.ta/",
      "note": "5ᵗʰ BCE Attic"
    },
    {
      "ipa": "/ˈstem.ma.ta/",
      "note": "1ˢᵗ CE Egyptian"
    },
    {
      "ipa": "/ˈstem.ma.ta/",
      "note": "4ᵗʰ CE Koine"
    },
    {
      "ipa": "/ˈstem.ma.ta/",
      "note": "10ᵗʰ CE Byzantine"
    },
    {
      "ipa": "/ˈste.ma.ta/",
      "note": "15ᵗʰ CE Constantinopolitan"
    }
  ],
  "word": "στέμματα"
}