Cal·houn (kăl-hn), John Caldwell 1782-1850.
Vice president of the United States (1825-1832) under John Quincy Adams and Andrew Jackson. In his political philosophy he maintained that the states had the right to nullify federal legislation that they deemed unconstitutional.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.