"CM" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Numéraux",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Polymères",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "num",
  "pos_title": "Numéral",
  "senses": [
    {
      "glosses": [
        "900 en chiffres romains majuscules."
      ],
      "id": "fr-CM-conv-num-4QENpTaG"
    }
  ],
  "word": "CM"
}

{
  "categories": [
    {
      "kind": "other",
      "name": "Polymères",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Symboles en conventions internationales",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Code défini par la norme ISO 3166."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole 1",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en conventions internationales de la géographie",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Code ISO 3166-1 (alpha-2) du Cameroun."
      ],
      "id": "fr-CM-conv-symbol-yMl7ahQJ",
      "topics": [
        "geography"
      ]
    }
  ],
  "word": "CM"
}

{
  "categories": [
    {
      "kind": "other",
      "name": "Polymères",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Symboles en conventions internationales",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Code défini par la norme ISO 1043."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole 2",
  "senses": [
    {
      "glosses": [
        "Polyéthylène chloré."
      ],
      "id": "fr-CM-conv-symbol-tRnUogFz",
      "topics": [
        "chemistry"
      ]
    }
  ],
  "word": "CM"
}

{
  "categories": [
    "Numéraux",
    "Polymères",
    "conventions internationales"
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "num",
  "pos_title": "Numéral",
  "senses": [
    {
      "glosses": [
        "900 en chiffres romains majuscules."
      ]
    }
  ],
  "word": "CM"
}

{
  "categories": [
    "Polymères",
    "Symboles en conventions internationales",
    "conventions internationales"
  ],
  "etymology_texts": [
    "Code défini par la norme ISO 3166."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole 1",
  "senses": [
    {
      "categories": [
        "Lexique en conventions internationales de la géographie"
      ],
      "glosses": [
        "Code ISO 3166-1 (alpha-2) du Cameroun."
      ],
      "topics": [
        "geography"
      ]
    }
  ],
  "word": "CM"
}

{
  "categories": [
    "Polymères",
    "Symboles en conventions internationales",
    "conventions internationales"
  ],
  "etymology_texts": [
    "Code défini par la norme ISO 1043."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole 2",
  "senses": [
    {
      "glosses": [
        "Polyéthylène chloré."
      ],
      "topics": [
        "chemistry"
      ]
    }
  ],
  "word": "CM"
}