de·duce (dĭ-ds, -dys)
tr.v. de·duced, de·duc·ing, de·duc·es
1. To reach (a conclusion) by reasoning.
2. To infer from a general principle; reason deductively: deduced from the laws of physics that the new airplane would fly.
3. To trace the origin or derivation of.
[Middle English deducen, from Latin dēdūcere, to lead away or down : dē-, de- + dūcere, to lead; see deuk- in the Appendix of Indo-European 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.