"onomatechny" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "-"
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      "expansion": "Ancient Greek",
      "name": "uder"
    }
  ],
  "etymology_text": "Ancient Greek",
  "head_templates": [
    {
      "args": {
        "1": "-"
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      "expansion": "onomatechny (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "name": "English undefined derivations",
          "parents": [
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            "Entry maintenance"
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          "source": "w"
        }
      ],
      "glosses": [
        "prognostication by the letters of a name"
      ],
      "id": "en-onomatechny-en-noun-o~c8OVV0",
      "links": [
        [
          "prognostication",
          "prognostication"
        ],
        [
          "letter",
          "letter"
        ],
        [
          "name",
          "name"
        ]
      ],
      "raw_glosses": [
        "(rare, obsolete) prognostication by the letters of a name"
      ],
      "tags": [
        "obsolete",
        "rare",
        "uncountable"
      ]
    }
  ],
  "word": "onomatechny"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Ancient Greek",
      "name": "uder"
    }
  ],
  "etymology_text": "Ancient Greek",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "onomatechny (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms derived from Ancient Greek",
        "English terms with obsolete senses",
        "English terms with rare senses",
        "English uncountable nouns",
        "English undefined derivations"
      ],
      "glosses": [
        "prognostication by the letters of a name"
      ],
      "links": [
        [
          "prognostication",
          "prognostication"
        ],
        [
          "letter",
          "letter"
        ],
        [
          "name",
          "name"
        ]
      ],
      "raw_glosses": [
        "(rare, obsolete) prognostication by the letters of a name"
      ],
      "tags": [
        "obsolete",
        "rare",
        "uncountable"
      ]
    }
  ],
  "word": "onomatechny"
}