res·i·due (rĕzĭ-d′, -dy′)
1. The remainder of something after removal of parts or a part.
a. Matter remaining after completion of an abstractive chemical or physical process, such as evaporation, combustion, distillation, or filtration; residuum.
b. The part of a monomer or other chemical unit that has been incorporated into a polymer or large molecule.
3. Law The remainder of a testator's estate after all specific bequests and applicable debts and expenses have been disposed of. Also called residuum.
[Middle English, from Old French residu, from Latin residuum, neuter of residuus, remaining, from residēre, to remain behind; see RESIDE.]
re·sidu·ar·y (rĭ-zĭj-ĕr′ē) adj.
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:
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.