"mc-" meaning in Translingual

{
  "etymology_text": "Typographical substitution for μ.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "prefix"
      },
      "expansion": "mc-",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "abbreviation of Englishmicro-",
          "word": "μ-"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual terms with non-redundant manual script codes",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of μ-; abbreviation of Englishmicro-."
      ],
      "id": "en-mc--mul-prefix-mul:Q154121",
      "links": [
        [
          "μ-",
          "μ-#Translingual:_Q154121"
        ],
        [
          "micro-",
          "micro-#English"
        ]
      ],
      "raw_glosses": [
        "(informal, proscribed) Alternative form of μ-; abbreviation of Englishmicro-."
      ],
      "senseid": [
        "mul:Q154121"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "informal",
        "morpheme",
        "proscribed"
      ],
      "wikidata": [
        "Q154121"
      ]
    }
  ],
  "word": "mc-"
}

{
  "etymology_text": "Typographical substitution for μ.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "prefix"
      },
      "expansion": "mc-",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "abbreviation of Englishmicro-",
          "word": "μ-"
        }
      ],
      "categories": [
        "Pages using catfix",
        "Pages with 1 entry",
        "Pages with entries",
        "Translingual abbreviations",
        "Translingual entries with incorrect language header",
        "Translingual informal terms",
        "Translingual lemmas",
        "Translingual prefixes",
        "Translingual proscribed terms",
        "Translingual terms derived from English",
        "Translingual terms with non-redundant manual script codes"
      ],
      "glosses": [
        "Alternative form of μ-; abbreviation of Englishmicro-."
      ],
      "links": [
        [
          "μ-",
          "μ-#Translingual:_Q154121"
        ],
        [
          "micro-",
          "micro-#English"
        ]
      ],
      "raw_glosses": [
        "(informal, proscribed) Alternative form of μ-; abbreviation of Englishmicro-."
      ],
      "senseid": [
        "mul:Q154121"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "informal",
        "morpheme",
        "proscribed"
      ],
      "wikidata": [
        "Q154121"
      ]
    }
  ],
  "word": "mc-"
}