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re·place·ment (rĭ-plāsmənt)
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n.
1. The act or process of replacing or of being replaced: a knee replacement; replacement of the furnace.
2. One that replaces another: The retiring manager's replacement will start next month. The company sent a replacement for the damaged item.
3. Statistics The act of returning each item that has been selected in a subset from a group before making another selection.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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:

    Indo-European Roots

    Semitic Roots

    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.

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