"μC" meaning in English

{
  "forms": [
    {
      "form": "μCs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "μC (plural μCs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "microcontroller"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms written in multiple scripts",
          "parents": [
            "Terms written in multiple scripts",
            "Terms by orthographic property",
            "Terms by lexical property"
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          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of microcontroller."
      ],
      "id": "en-μC-en-noun-f2KEgDVK",
      "links": [
        [
          "microcontroller",
          "microcontroller#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "μC"
}

{
  "forms": [
    {
      "form": "μCs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "μC (plural μCs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "microcontroller"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms spelled with Μ",
        "English terms written in multiple scripts",
        "English words without vowels"
      ],
      "glosses": [
        "Abbreviation of microcontroller."
      ],
      "links": [
        [
          "microcontroller",
          "microcontroller#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "μC"
}