Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Cleaningwashing sodaˈwashing ˌsoda noun [uncountable] DHCa chemical that is added to water to clean very dirty thingsExamples from the Corpuswashing soda• Most, however, consisted of simple washing soda, Epsom salts, or other innocuous ingredients. ldoceonline.com
