washing soda

noun

1. sodium carbonate ( def 2 ).

washing soda

noun

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

Word History and Origins

Origin of washing soda¹

First recorded in 1840–50

Example Sentences

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

On Earth, sodium carbonate is often known as washing soda or soda ash.

From New York Times

The culprit turned out to be sodium carbonate, or washing soda.

From National Geographic

Why buy laundry detergent when you can just grate some soap and put it in a jar with washing soda?

From The Guardian

Add the grated soap to 250ml each of washing soda and borax, mix well.

From The Guardian