Definition of "bleaching powder" [bleaching powder]
A powder containing calcium chloride and calcium hypochlorite, used in solution as a bleach. Also called chloride of lime, chlorinated lime.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.