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[duhkt] /dʌkt/
any tube, canal, pipe, or conduit by which a fluid, air, or other substance is conducted or conveyed.
Anatomy, Zoology. a tube, canal, or vessel conveying a body fluid, especially a glandular secretion or excretion.
Botany. a cavity or vessel formed by elongated cells or by many cells.
Electricity. a single enclosed runway for conductors or cables.
Printing. (in a press) the reservoir for ink.
verb (used with object)
to convey or channel by means of a duct or ducts:
Heat from the oven is ducted to the outside.
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 forms
ductless, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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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.

    The Tower of Oblivion Oliver Onions
  • 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.

  • In recent years the glandular system, and especially that of the ductless glands, has taken on an altogether new significance.

  • The activities of the ductless glands and their hormones equally serve both ends in ways that cannot be distinguished.

  • This is the spleen, a ductless gland, the use of which is not altogether known.

  • Other ductless glands in the body also affect the mental and physiological functions of the whole organism.

  • Madame Zattiany explained in the simplest language she could command the meaning and the function of the ductless glands.

    Black Oxen

    Gertrude Franklin Horn Atherton
British Dictionary definitions for ductless


a tube, pipe, or canal by means of which a substance, esp a fluid or gas, is conveyed
any bodily passage, esp one conveying secretions or excretions
a narrow tubular cavity in plants, often containing resin or some other substance
Also called conduit. a channel or pipe carrying electric cable or wires
a passage through which air can flow, as in air conditioning
the ink reservoir in a printing press
Derived Forms
ductless, 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
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Word Origin and History for ductless



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.

Online Etymology Dictionary, © 2010 Douglas Harper
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ductless in Medicine

ductless duct·less (dŭkt'lĭs)
Lacking a duct, as glands that only secrete internally.

duct (dŭkt)
A tubular bodily canal or passage, especially one for carrying a glandular secretion such as bile.

duct·al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ductless in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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