fuming sulphuric acid
- a mixture of pyrosulphuric acid, H 2 S 2 O 7, and other condensed acids, made by dissolving sulphur trioxide in concentrated sulphuric acidAlso called: oleum, Nordhausen acid (ˈnɔːdhaʊzən)
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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