the soot of a natural gas flame, used in paints; fine carbon.
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Origin of gas black
First recorded in 1880–85
Also called channel black.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for channel black
finely powdered carbon produced by burning natural gas. It is used as a pigment in paints, etc
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