"annulation" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0 0",
      "word": "benzannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "benzoannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "cyclobutannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "cycloheptannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "cyclohexannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "cyclooctannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "cyclopentannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "cyclopropannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "photoannulation"
    },
    {
      "_dis1": "0 0 0",
      "word": "transannulation"
    }
  ],
  "etymology_text": "* From annulus",
  "forms": [
    {
      "form": "annulations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "annulation (plural annulations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The formation of a ring"
      ],
      "id": "en-annulation-en-noun-ltW50Xz7",
      "links": [
        [
          "ring",
          "ring"
        ]
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "11 55 33",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "7 65 28",
          "kind": "other",
          "name": "Terms with Portuguese translations",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "5 75 20",
          "kind": "topical",
          "langcode": "en",
          "name": "Chemical reactions",
          "orig": "en:Chemical reactions",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Any reaction that forms a ring of atoms"
      ],
      "id": "en-annulation-en-noun-Vu6AJ5m~",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "reaction",
          "reaction"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Any reaction that forms a ring of atoms"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ],
      "translations": [
        {
          "_dis1": "4 83 12",
          "code": "pt",
          "lang": "Portuguese",
          "sense": "any reaction that forms a ring of atoms",
          "tags": [
            "feminine"
          ],
          "word": "anelação"
        }
      ]
    },
    {
      "glosses": [
        "Any structure in the form of a ring"
      ],
      "id": "en-annulation-en-noun-blN6HCpd"
    }
  ],
  "wikipedia": [
    "annulation"
  ],
  "word": "annulation"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "Terms with Portuguese translations",
    "en:Chemical reactions"
  ],
  "derived": [
    {
      "word": "benzannulation"
    },
    {
      "word": "benzoannulation"
    },
    {
      "word": "cyclobutannulation"
    },
    {
      "word": "cycloheptannulation"
    },
    {
      "word": "cyclohexannulation"
    },
    {
      "word": "cyclooctannulation"
    },
    {
      "word": "cyclopentannulation"
    },
    {
      "word": "cyclopropannulation"
    },
    {
      "word": "photoannulation"
    },
    {
      "word": "transannulation"
    }
  ],
  "etymology_text": "* From annulus",
  "forms": [
    {
      "form": "annulations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "annulation (plural annulations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The formation of a ring"
      ],
      "links": [
        [
          "ring",
          "ring"
        ]
      ]
    },
    {
      "categories": [
        "en:Organic chemistry"
      ],
      "glosses": [
        "Any reaction that forms a ring of atoms"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "reaction",
          "reaction"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Any reaction that forms a ring of atoms"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    },
    {
      "glosses": [
        "Any structure in the form of a ring"
      ]
    }
  ],
  "translations": [
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "any reaction that forms a ring of atoms",
      "tags": [
        "feminine"
      ],
      "word": "anelação"
    }
  ],
  "wikipedia": [
    "annulation"
  ],
  "word": "annulation"
}