"sch." meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Sigles en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Abréviation de schedule number."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "Sigle"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en anglais de la métallurgie",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en anglais de la plomberie",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Classe d’épaisseur pour les tuyauteries et raccords."
      ],
      "id": "fr-sch.-en-noun-Ujsk9Fwe",
      "topics": [
        "metallurgy",
        "plumbing"
      ]
    }
  ],
  "word": "sch."
}

{
  "categories": [
    "Lemmes en anglais",
    "Noms communs en anglais",
    "Sigles en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Abréviation de schedule number."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "Sigle"
  ],
  "senses": [
    {
      "categories": [
        "Lexique en anglais de la métallurgie",
        "Lexique en anglais de la plomberie",
        "Wiktionnaire:Exemples manquants en anglais"
      ],
      "glosses": [
        "Classe d’épaisseur pour les tuyauteries et raccords."
      ],
      "topics": [
        "metallurgy",
        "plumbing"
      ]
    }
  ],
  "word": "sch."
}