Definition of washing soda
: a transparent crystalline hydrated sodium carbonate
First Known Use of washing soda
WASHING SODA Defined for English Language Learners
Definition of washing soda for English Language Learners
: a chemical that is added to water to help clean very dirty clothes, towels, sheets, etc.
Medical Definition of washing soda
: a transparent crystalline hydrated sodium carbonate—called also sal soda
Seen and Heard
What made you want to look up washing soda? Please tell us where you read or heard it (including the quote, if possible).