From Longman Dictionary of Contemporary Englishwashing powderˈwashing ˌpowder ●●○ noun [countable, uncountable] British EnglishDHC soap in the form of a powder used for washing clothes
Examples from the Corpus
washing powder• Remove stubborn caramelised turkey grease from the roasting tray by filling it with a solution of biological washing powder.• Cats usually spray areas they've sprayed before, so clean up using biological washing powder followed by alcohol.• Now an enzyme is more than what comes with a pack of washing powder.• The house is warm inside and smells of washing powder.• And part of the £50,000 deal includes advertising household products like the washing powder and Flora margarine in the foyer. 