Pronunciation: (sō'du),[key] —n. 1. See sodium hydroxide. 2. See sodium monoxide. 3. See sodium carbonate (def. 2).
4. sodium, as in carbonate of soda.
5. See soda water. 6. a drink made with soda water, flavoring, such as fruit or other syrups, and often ice cream, milk, etc.
7. soda pop.
8. (in faro) the card turned up in the dealing box before one begins to play.