Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An often enclosed passage or channel for conveying a substance, especially a liquid or gas.
  • noun Anatomy A tubular bodily canal or passage, especially one for carrying a glandular secretion.
  • noun A tube or pipe for enclosing electrical cables or wires.
  • transitive verb To channel through a duct.
  • transitive verb To supply with ducts.

from The Century Dictionary.

  • noun Leading; guidance; direction; bearing.
  • noun Any tube or canal by which a fluid is conducted or conveyed.
  • noun In bot.:
  • noun A long continuous vessel or canal, formed by a row of cells which have lost their intervening partitions. The walls are variously marked by pits and by spiral, annular, or reticulated thickenings, and the cavity may be filled with air or water, or they may be lactiferous.
  • noun In bryology, the narrow continuous cells which surround the utricles in the leaves of Sphagnum.
  • To draw: said of muscles which abduct, adduct, or circumduct a part, such as the leg or the eye.

from the GNU version of the Collaborative International Dictionary of English.

  • noun Any tube or canal by which a fluid or other substance is conducted or conveyed.
  • noun (Anat.) One of the vessels of an animal body by which the products of glandular secretion are conveyed to their destination.
  • noun (Bot.) A large, elongated cell, either round or prismatic, usually found associated with woody fiber.
  • noun obsolete Guidance; direction.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A pipe, tube or canal which carries air or liquid from one place to another.
  • noun An enclosure or channel for electrical cable runs.
  • noun obsolete Guidance; direction.
  • verb To channel something through a duct (or series of ducts)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
  • noun an enclosed conduit for a fluid
  • noun a continuous tube formed by a row of elongated cells lacking intervening end walls

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin ductus, act of leading, from past participle of dūcere, to lead; see deuk- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin ductus, noun use of past participle of dūcere ("to lead, draw"). Compare douit.

Examples

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