1. ductwork.
  2. materials for making ducts.


  1. any tube, canal, pipe, or conduit by which a fluid, air, or other substance is conducted or conveyed.
  2. Anatomy, Zoology. a tube, canal, or vessel conveying a body fluid, especially a glandular secretion or excretion.
  3. Botany. a cavity or vessel formed by elongated cells or by many cells.
  4. Electricity. a single enclosed runway for conductors or cables.
  5. Printing. (in a press) the reservoir for ink.

verb (used with object)

  1. to convey or channel by means of a duct or ducts: Heat from the oven is ducted to the outside.


  1. a tube, pipe, or canal by means of which a substance, esp a fluid or gas, is conveyed
  2. any bodily passage, esp one conveying secretions or excretions
  3. a narrow tubular cavity in plants, often containing resin or some other substance
  4. Also called: conduit a channel or pipe carrying electric cable or wires
  5. a passage through which air can flow, as in air conditioning
  6. the ink reservoir in a printing press

1640s, “course, direction,” from Latin ductus “a leading,” past participle of ducere “to lead” (see duke (n.)). Anatomical sense is from 1660s. Meaning “conduit, channel” is 1713; that of “air tube in a structure” is from 1884.


  1. A tubular bodily canal or passage, especially one for carrying a glandular secretion such as bile.

  1. A tube or tubelike structure through which something flows, especially a tube in the body for carrying a fluid secreted that is by a gland.
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