"\m/" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en conventions internationales",
      "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": [
    "Main styliséecomposé de \\ (« auriculaire levé »), m (« annulaire et majeur pliés ») et / (« index levé »)."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en conventions internationales de l’Internet",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en conventions internationales du metal",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Signe des cornes, cornes du diable, main cornue."
      ],
      "id": "fr-\\m/-conv-symbol-iPOxjjFL",
      "raw_tags": [
        "Internet",
        "Metal"
      ]
    }
  ],
  "synonyms": [
    {
      "raw_tags": [
        "U+1F918"
      ],
      "word": "🤘"
    }
  ],
  "word": "\\m/"
}

{
  "categories": [
    "Compositions en conventions internationales",
    "Symboles en conventions internationales",
    "conventions internationales"
  ],
  "etymology_texts": [
    "Main styliséecomposé de \\ (« auriculaire levé »), m (« annulaire et majeur pliés ») et / (« index levé »)."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole",
  "senses": [
    {
      "categories": [
        "Lexique en conventions internationales de l’Internet",
        "Lexique en conventions internationales du metal"
      ],
      "glosses": [
        "Signe des cornes, cornes du diable, main cornue."
      ],
      "raw_tags": [
        "Internet",
        "Metal"
      ]
    }
  ],
  "synonyms": [
    {
      "raw_tags": [
        "U+1F918"
      ],
      "word": "🤘"
    }
  ],
  "word": "\\m/"
}