"semigrupo" meaning in Spanish

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "semi-",
        "3": "grupo"
      },
      "expansion": "semi- + grupo",
      "name": "af"
    }
  ],
  "etymology_text": "From semi- + grupo.",
  "forms": [
    {
      "form": "semigrupos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "semigrupo m (plural semigrupos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish terms prefixed with semi-",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "semigroup"
      ],
      "id": "en-semigrupo-es-noun-Rqf6-uf2",
      "links": [
        [
          "semigroup",
          "semigroup"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "semigrupo"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "semi-",
        "3": "grupo"
      },
      "expansion": "semi- + grupo",
      "name": "af"
    }
  ],
  "etymology_text": "From semi- + grupo.",
  "forms": [
    {
      "form": "semigrupos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "semigrupo m (plural semigrupos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish nouns",
        "Spanish terms prefixed with semi-"
      ],
      "glosses": [
        "semigroup"
      ],
      "links": [
        [
          "semigroup",
          "semigroup"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "semigrupo"
}