duct

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duct

1. any bodily passage, esp one conveying secretions or excretions
2. a narrow tubular cavity in plants, often containing resin or some other substance
3. a channel or pipe carrying electric cable or wires
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Duct

A nonmetallic or metallic tube for housing wires or cables, may be underground or embedded in concrete floor slabs; a duct usually fabricated of metal, used to transfer air from one location to another.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

duct

[dəkt]
(anatomy)
An enclosed tubular channel for conducting a glandular secretion or other body fluid.
(communications)
An enclosed runway for cables.
(geophysics)
The space between two air layers, or between an air layer and the earth's surface, in which microwave beams are trapped in ducting. Also known as radio duct; tropospheric duct.
(mechanical engineering)
A fluid flow passage which may range from a few inches in diameter to many feet in rectangular cross section, usually constructed of galvanized steel, aluminum, or copper, through which air flows in a ventilation system or to a compressor, supercharger, or other equipment at speeds ranging to thousands of feet per minute.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

duct

1. ,See air duct.
2. In electric systems, a metallic or nonmetallic tube, (usually circular, oval, rectangular, or octagonal) for housing wires or cables; may be underground or embedded in concrete floor slabs.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

duct

A thin-wall tube installed in aircraft air-conditioning and heating systems to carry heated or cooled air for distribution to various aircraft locations.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
25498 Butler Rd, Junction City; Wolf Joint Trust; Install Ductless Heat Pump; $7,130.
Koza John D, 7298 Elderberry St; install ductless heat pump with 2 indoor units; $7,163.
In these cases a ductless workstation or hood can be utilized to provide fume containment where and when it is needed, instead of being tied to a single exhaust hood on the wrong side of the room or building."
Bond Peggy A, 435 W D St; install ductless heat pump; $4,151.
Williams Maria E, 235 W G St; Install Ductless Heat Pump.
The $600 million industry looks poised to grow further, and part of that growth will depend on technologies that help users make the most out of both ducted and ductless technologies.
Rulien Chris R & Debra G, 1230 Pleasant St.; Electrical For Ductless Heatpump; $7,654.
Ductless fume hoods, also known as carbon-filtered enclosures, are self-contained, filtered laboratory enclosures that remove hazardous fumes, vapors and particles from the laboratory.
The Air Science USA Mobile, EDU, a mobile ductless fume hood, is suited for classroom demonstrations and industrial training and provides all around visibility.
Springfield Utility Board, 202 S 18th St; install new ductless heat pump system; $3,550.
The Air Science Vent-Box ductless filtration system is designed to protect laboratory personnel from chemical vapors found inside of standalone chemical safety cabinets.