a. Any of various forms of sodium carbonate.
b. Chemically combined sodium.
a. See carbonated water.
3. A refreshment made from carbonated water, ice cream, and usually a flavoring.
4. Games The card turned face up and discarded 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; see šwd in the Appendix of Semitic roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.