Submitted by György Chityil ... on Fri, 01/19/2018 - 21:46 Hierarchy: NounDescription: {{italbrac|Railway slang}} Unburned carbon (smoke) from a diesel locomotive or multiple unit.Ngram: clagNgram Text: clagSource: WiktionaryIssue: 0Wiktionary tag: italbracNgram Count: 1