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washing soda

American  
washing soda British  

noun

  1. the crystalline decahydrate of sodium carbonate, esp when used as a cleansing agent

"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

Etymology

Origin of washing soda

First recorded in 1840–50

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Example Sentences

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Also, Wang says, the washing soda used in stripping can combine with deposits in hard water to create additional residue on fabrics.

From Washington Post Oct. 6, 2021

Charges that phosphates in detergents ultimately kill wildlife in streams and lakes have opened new opportunities for Arm & Hammer washing soda.

From Time Magazine Archive

In combination with carbonic acid, as carbonate of soda, it forms the common washing soda of the shops.

From The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools by Waring, George E. (George Edwin)

Thought you’d mixed the soapsuds and washing soda for him.

From Betty Gordon in the Land of Oil The Farm That Was Worth a Fortune by Emerson, Alice B.

Cover the burned part as quickly as possible with vaseline or a clean cloth soaked in a quart of boiled water containing a cup of washing soda.

From Health Lessons Book 1 by Davison, Alvin

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