"headgroup" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "head",
        "3": "group"
      },
      "expansion": "head + group",
      "name": "compound"
    }
  ],
  "etymology_text": "From head + group.",
  "forms": [
    {
      "form": "headgroups",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "headgroup (plural headgroups)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "_dis1": "0 0",
      "word": "tailgroup"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "55 45",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w+disamb"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Pages with 1 entry",
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          "source": "w+disamb"
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        {
          "_dis": "55 45",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A bulky part of a molecule, often containing one or more functional groups, attached to a relatively long aliphatic tail or backbone"
      ],
      "id": "en-headgroup-en-noun-cawhrvRe",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "molecule",
          "molecule"
        ],
        [
          "functional group",
          "functional group"
        ],
        [
          "aliphatic",
          "aliphatic"
        ],
        [
          "tail",
          "tail"
        ],
        [
          "backbone",
          "backbone"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) A bulky part of a molecule, often containing one or more functional groups, attached to a relatively long aliphatic tail or backbone"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "55 45",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "55 45",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The group of instances at the head (high end) of a distribution curve"
      ],
      "id": "en-headgroup-en-noun-f7FNXIq6",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "group",
          "group"
        ],
        [
          "head",
          "head"
        ],
        [
          "distribution",
          "distribution"
        ],
        [
          "curve",
          "curve"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The group of instances at the head (high end) of a distribution curve"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "head group"
    }
  ],
  "word": "headgroup"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "head",
        "3": "group"
      },
      "expansion": "head + group",
      "name": "compound"
    }
  ],
  "etymology_text": "From head + group.",
  "forms": [
    {
      "form": "headgroups",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "headgroup (plural headgroups)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "tailgroup"
    }
  ],
  "senses": [
    {
      "categories": [
        "en:Organic chemistry"
      ],
      "glosses": [
        "A bulky part of a molecule, often containing one or more functional groups, attached to a relatively long aliphatic tail or backbone"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "molecule",
          "molecule"
        ],
        [
          "functional group",
          "functional group"
        ],
        [
          "aliphatic",
          "aliphatic"
        ],
        [
          "tail",
          "tail"
        ],
        [
          "backbone",
          "backbone"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) A bulky part of a molecule, often containing one or more functional groups, attached to a relatively long aliphatic tail or backbone"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    },
    {
      "categories": [
        "en:Mathematics"
      ],
      "glosses": [
        "The group of instances at the head (high end) of a distribution curve"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "group",
          "group"
        ],
        [
          "head",
          "head"
        ],
        [
          "distribution",
          "distribution"
        ],
        [
          "curve",
          "curve"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The group of instances at the head (high end) of a distribution curve"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "head group"
    }
  ],
  "word": "headgroup"
}