"monocation" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mono",
        "3": "cation"
      },
      "expansion": "mono- + cation",
      "name": "prefix"
    }
  ],
  "etymology_text": "From mono- + cation.",
  "forms": [
    {
      "form": "monocations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "monocation (plural monocations)",
      "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 terms prefixed with mono-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ions",
          "orig": "en:Ions",
          "parents": [
            "Chemistry",
            "Electricity",
            "Matter",
            "Sciences",
            "Electromagnetism",
            "Nature",
            "All topics",
            "Physics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "monocationic"
        }
      ],
      "glosses": [
        "A cation formed by removal of a single electron from a neutral species"
      ],
      "id": "en-monocation-en-noun-3C-2snr0",
      "links": [
        [
          "cation",
          "cation"
        ]
      ],
      "related": [
        {
          "word": "dication"
        },
        {
          "word": "trication"
        },
        {
          "word": "tetracation"
        }
      ]
    }
  ],
  "word": "monocation"
}

{
  "derived": [
    {
      "word": "monocationic"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mono",
        "3": "cation"
      },
      "expansion": "mono- + cation",
      "name": "prefix"
    }
  ],
  "etymology_text": "From mono- + cation.",
  "forms": [
    {
      "form": "monocations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "monocation (plural monocations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "dication"
    },
    {
      "word": "trication"
    },
    {
      "word": "tetracation"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with mono-",
        "Pages with 1 entry",
        "en:Ions"
      ],
      "glosses": [
        "A cation formed by removal of a single electron from a neutral species"
      ],
      "links": [
        [
          "cation",
          "cation"
        ]
      ]
    }
  ],
  "word": "monocation"
}