Sulphur dioxide

World English Dictionary
sulphur dioxide
 
n
Systematic name: sulphur(IV) oxide a colourless soluble pungent gas produced by burning sulphur. It is both an oxidizing and a reducing agent and is used in the manufacture of sulphuric acid, the preservation of a wide range of foodstuffs (E220), bleaching, and disinfecting. Formula: SO2

Collins English Dictionary - Complete & Unabridged 10th Edition
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WordNet
sulphur dioxide

noun
a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain [syn: sulfur dioxide
WordNet® 3.0, © 2006 by Princeton University.
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