Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a fuel gas that is a poisonous mixture of hydrogen, carbon dioxide, carbon monoxide, and nitrogen, made by forcing steam over incandescent coke or coal
Used by arrangement with John Wiley & Sons, Inc.
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A fuel gas containing about 50 percent carbon monoxide, 40 percent hydrogen, and small amounts of methane, carbon dioxide, and nitrogen, made by passing steam and air over heated coke or coal.