"Zener card" meaning in English

{
  "etymology_text": "Named after psychologist Karl Zener.",
  "forms": [
    {
      "form": "Zener cards",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Zener card (plural Zener cards)",
      "name": "en-noun"
    }
  ],
  "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "One of a set of twenty-five cards, each featuring one of five symbols (circle, plus sign, square, star, wavy lines), used by researchers to test claims of ESP or remote viewing."
      ],
      "id": "en-Zener_card-en-noun--AyME2xt",
      "links": [
        [
          "card",
          "card"
        ],
        [
          "symbol",
          "symbol"
        ],
        [
          "plus sign",
          "plus sign"
        ],
        [
          "wavy",
          "wavy"
        ],
        [
          "ESP",
          "ESP"
        ],
        [
          "remote viewing",
          "remote viewing"
        ]
      ],
      "wikipedia": [
        "Karl Zener"
      ]
    }
  ],
  "word": "Zener card"
}

{
  "etymology_text": "Named after psychologist Karl Zener.",
  "forms": [
    {
      "form": "Zener cards",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Zener card (plural Zener cards)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "One of a set of twenty-five cards, each featuring one of five symbols (circle, plus sign, square, star, wavy lines), used by researchers to test claims of ESP or remote viewing."
      ],
      "links": [
        [
          "card",
          "card"
        ],
        [
          "symbol",
          "symbol"
        ],
        [
          "plus sign",
          "plus sign"
        ],
        [
          "wavy",
          "wavy"
        ],
        [
          "ESP",
          "ESP"
        ],
        [
          "remote viewing",
          "remote viewing"
        ]
      ],
      "wikipedia": [
        "Karl Zener"
      ]
    }
  ],
  "word": "Zener card"
}