- powdered detergent for washing fabrics
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
Examples from the Web for washing powder
Finally, him and his two brothers invented a kind of washing-powder.
Mrs. Stillwell opened the screen door to take in the carrots and soap and washing-powder Shelby used to bring her.