"semi-groupe" meaning in Francese

{
  "categories": [
    {
      "kind": "other",
      "name": "Sostantivi in francese",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Francese",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Sostantivo",
  "senses": [
    {
      "glosses": [
        "semigruppo"
      ],
      "id": "it-semi-groupe-fr-noun-sml5zzQx",
      "topics": [
        "mathematics"
      ]
    }
  ],
  "word": "semi-groupe"
}

{
  "categories": [
    "Sostantivi in francese"
  ],
  "lang": "Francese",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Sostantivo",
  "senses": [
    {
      "glosses": [
        "semigruppo"
      ],
      "topics": [
        "mathematics"
      ]
    }
  ],
  "word": "semi-groupe"
}