Dictionary.com
definitions
  • synonyms

duct

[duhkt]
See more synonyms on Thesaurus.com
noun
  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.
Show More
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.
Show More

Origin of duct

1640–50; < Latin ductus conveyance (of water), hence channel (in ML), equivalent to duc- (variant stem of dūcere to lead) + -tus suffix of verbal action
Related formsduct·less, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ductless

Historical Examples

  • Secretions in ductless and sac filling glands are for reabsorption.

    The White Spark

    Orville Livingston Leach

  • At the present time the tendency among some writers is to make the ductless glands the responsible agents in almost all diseases.

    Arteriosclerosis and Hypertension:

    Louis Marshall Warfield

  • As I hadn't the faintest idea what a ductless gland was I continued silent.

  • It is a "ductless" gland, its secretions apparently being taken up by absorption into the lymph, and from that into the blood.

    Vitality Supreme

    Bernarr Macfadden

  • This behavior is caused by the capture, storage and release of energy through the ductless glands.


British Dictionary definitions for ductless

duct

noun
  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
Show More
Derived Formsductless, adjective

Word Origin

C17: from Latin ductus a leading (in Medieval Latin: aqueduct), from dūcere to lead
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ductless

duct

n.

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.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

ductless in Medicine

ductless

(dŭktlĭs)
adj.
  1. Lacking a duct, as glands that only secrete internally.
Show More

duct

(dŭkt)
n.
  1. A tubular bodily canal or passage, especially one for carrying a glandular secretion such as bile.
Show More
Related formsduct•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ductless in Science

duct

[dŭkt]
  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.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.