"sottosistema" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "sotto",
        "3": "sistema"
      },
      "expansion": "sotto- + sistema",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sotto- + sistema.",
  "forms": [
    {
      "form": "sottosistemi",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "sottosistema m (plural sottosistemi)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian nouns with irregular gender",
          "parents": [
            "Nouns with irregular gender",
            "Irregular nouns",
            "Nouns by inflection type",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian terms prefixed with sotto-",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "subsystem"
      ],
      "id": "en-sottosistema-it-noun-ZprL0VkP",
      "links": [
        [
          "subsystem",
          "subsystem"
        ]
      ],
      "related": [
        {
          "word": "sistema"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "sottosistema"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "sotto",
        "3": "sistema"
      },
      "expansion": "sotto- + sistema",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sotto- + sistema.",
  "forms": [
    {
      "form": "sottosistemi",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "sottosistema m (plural sottosistemi)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "related": [
    {
      "word": "sistema"
    }
  ],
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian nouns",
        "Italian nouns with irregular gender",
        "Italian terms prefixed with sotto-"
      ],
      "glosses": [
        "subsystem"
      ],
      "links": [
        [
          "subsystem",
          "subsystem"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "sottosistema"
}