any of several gaseous mixtures consisting essentially of carbon monoxide and hydrogen, used in the synthesis of chemical compounds, as ammonia and alcohols.
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Origin of synthesis gas
First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a mixture of carbon dioxide, carbon monoxide, and hydrogen formerly made by using water gas and reacting it with steam to enrich the proportion of hydrogen for use in the synthesis of ammonia
a similar mixture of gases made by steam reforming natural gas, used for synthesizing organic chemicals and as a fuel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012