washing soda

noun

: a transparent crystalline hydrated sodium carbonate

Examples of washing soda in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This powerful powder is made from natural ingredients such as baking soda, washing soda, and citric acid for a gentle yet effective clean. Amber Smith, Discover Magazine, 22 Apr. 2023 The laundry stripping recipe involves adding borax, washing soda (sodium carbonate — not baking soda) and laundry detergent in a 1:1:2 ratio. Amanda Garrity, Good Housekeeping, 15 Apr. 2022 The classic homemade recipe available online contains a combination of washing soda, borax and some sort of soap (such as Dr. Bronner’s). New York Times, 28 Oct. 2021 Sachs says to fill a bathtub with hot water and add a quarter-cup of borax, a quarter-cup of washing soda (a.k.a. sodium carbonate) and a half-cup of detergent. Washington Post, 27 Sep. 2021

Word History

First Known Use

1847, in the meaning defined above

Time Traveler
The first known use of washing soda was in 1847

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Cite this Entry

“Washing soda.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/washing%20soda. Accessed 10 Sep. 2025.

Kids Definition

washing soda

noun
: a transparent crystalline sodium carbonate combined chemically with water

Medical Definition

washing soda

noun
: a transparent crystalline hydrated sodium carbonate

called also sal soda

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