"半開区間" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 国際音声記号あり",
      "parents": [],
      "source": "w"
    }
  ],
  "coordinate_terms": [
    {
      "word": "閉区間"
    },
    {
      "word": "開区間"
    },
    {
      "word": "全区間"
    }
  ],
  "forms": [
    {
      "form": "はんかいくかん"
    }
  ],
  "hypernyms": [
    {
      "word": "集合"
    },
    {
      "word": "区間"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "日本語 数学",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "区間 a≦x<b,;a<x≦bのこと。それぞれx∈[a,b),;x∈(a,b]のように書く。"
      ],
      "id": "ja-半開区間-ja-noun-vv6k9pix",
      "topics": [
        "mathematics"
      ]
    }
  ],
  "sounds": [
    {
      "form": "はんかいくかん",
      "raw_tags": [
        "東京式"
      ],
      "roman": "[hàńkáíkúꜜkàǹ]",
      "tags": [
        "Nakadaka"
      ]
    },
    {
      "ipa": "[hã̠ŋka̠ikɯ̟ᵝkã̠ɴ]"
    }
  ],
  "word": "半開区間"
}

{
  "categories": [
    "日本語",
    "日本語 名詞",
    "日本語 国際音声記号あり"
  ],
  "coordinate_terms": [
    {
      "word": "閉区間"
    },
    {
      "word": "開区間"
    },
    {
      "word": "全区間"
    }
  ],
  "forms": [
    {
      "form": "はんかいくかん"
    }
  ],
  "hypernyms": [
    {
      "word": "集合"
    },
    {
      "word": "区間"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        "日本語 数学"
      ],
      "glosses": [
        "区間 a≦x<b,;a<x≦bのこと。それぞれx∈[a,b),;x∈(a,b]のように書く。"
      ],
      "topics": [
        "mathematics"
      ]
    }
  ],
  "sounds": [
    {
      "form": "はんかいくかん",
      "raw_tags": [
        "東京式"
      ],
      "roman": "[hàńkáíkúꜜkàǹ]",
      "tags": [
        "Nakadaka"
      ]
    },
    {
      "ipa": "[hã̠ŋka̠ikɯ̟ᵝkã̠ɴ]"
    }
  ],
  "word": "半開区間"
}