v. de·duct·ed, de·duct·ing, de·ducts
1. To take away (a quantity) from another; subtract.
2. To derive by deduction; deduce.
To take away a desirable part: Poor plumbing deducts from the value of the house.
[Middle English deducten, from Latin dēdūcere, dēduct-, to lead away or down; see DEDUCE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.