1. An often enclosed passage or channel for conveying a substance, especially a liquid or gas.
2. Anatomy A tubular bodily canal or passage, especially one for carrying a glandular secretion: a tear duct.
3. A tube or pipe for enclosing electrical cables or wires.
tr.v. duct·ed, duct·ing, ducts
1. To channel through a duct: duct the moist air away.
2. To supply with ducts.
[Latin ductus, act of leading, from past participle of dūcere, to lead; see deuk- in the Appendix of Indo-European roots.]
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.