1) Any of various forms of sodium carbonate.
2) Chemically combined sodium.

See carbonated water.

Chiefly Northeastern U.S., Eastern Missouri, & Southwestern Illinois. See soft drink. See Regional Note at tonic.

A refreshment made from carbonated water, ice cream, and usually a flavoring.

Games. The card turned face up at the beginning of faro.

[Middle English sode, soda, saltwort, soda, from Old Italian soda, perhaps from Arabic suwayd, soda, soda-plant or suwayda, type of saltwort.]