"quaternary ammonium" meaning in English

{
  "forms": [
    {
      "form": "quaternary ammoniums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "quaternary ammonium (countable and uncountable, plural quaternary ammoniums)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Chemistry",
          "orig": "en:Chemistry",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "QUAT",
          "word": "quat"
        },
        {
          "word": "quaternary ammonium base"
        },
        {
          "english": "QAC",
          "word": "quaternary ammonium cation"
        },
        {
          "english": "QAC",
          "word": "quaternary ammonium compound"
        },
        {
          "word": "quaternary ammonium halide"
        },
        {
          "english": "QAS",
          "word": "quaternary ammonium salt"
        },
        {
          "word": "quaternium"
        }
      ],
      "glosses": [
        "An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group"
      ],
      "hypernyms": [
        {
          "word": "cationic detergent"
        }
      ],
      "hyponyms": [
        {
          "word": "tetraalkylammonium"
        },
        {
          "word": "polyquaternium"
        },
        {
          "word": "cetyltrimethylammonium"
        },
        {
          "word": "cetrimonium"
        },
        {
          "word": "polyquat"
        },
        {
          "word": "iminium"
        },
        {
          "word": "viologen"
        }
      ],
      "id": "en-quaternary_ammonium-en-noun-i9YD3Yu1",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "group",
          "group"
        ],
        [
          "hydrogen",
          "hydrogen"
        ],
        [
          "alkyl",
          "alkyl"
        ],
        [
          "aryl",
          "aryl"
        ]
      ],
      "raw_glosses": [
        "(chemistry) An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group"
      ],
      "synonyms": [
        {
          "word": "quat"
        },
        {
          "word": "quaternary amine"
        },
        {
          "word": "quaternium"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "quaternary ammonium"
}

{
  "derived": [
    {
      "english": "QUAT",
      "word": "quat"
    },
    {
      "word": "quaternary ammonium base"
    },
    {
      "english": "QAC",
      "word": "quaternary ammonium cation"
    },
    {
      "english": "QAC",
      "word": "quaternary ammonium compound"
    },
    {
      "word": "quaternary ammonium halide"
    },
    {
      "english": "QAS",
      "word": "quaternary ammonium salt"
    },
    {
      "word": "quaternium"
    }
  ],
  "forms": [
    {
      "form": "quaternary ammoniums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "quaternary ammonium (countable and uncountable, plural quaternary ammoniums)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "cationic detergent"
    }
  ],
  "hyponyms": [
    {
      "word": "tetraalkylammonium"
    },
    {
      "word": "polyquaternium"
    },
    {
      "word": "cetyltrimethylammonium"
    },
    {
      "word": "cetrimonium"
    },
    {
      "word": "polyquat"
    },
    {
      "word": "iminium"
    },
    {
      "word": "viologen"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Chemistry"
      ],
      "glosses": [
        "An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "group",
          "group"
        ],
        [
          "hydrogen",
          "hydrogen"
        ],
        [
          "alkyl",
          "alkyl"
        ],
        [
          "aryl",
          "aryl"
        ]
      ],
      "raw_glosses": [
        "(chemistry) An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group"
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "quat"
    },
    {
      "word": "quaternary amine"
    },
    {
      "word": "quaternium"
    }
  ],
  "word": "quaternary ammonium"
}