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[muhth -er-bawrd, -bohrd] /ˈmʌð ərˌbɔrd, -ˌboʊrd/
noun, Computers.
a rigid, slotted board upon which other boards that contain the basic circuitry of a computer or of a computer component can be mounted.
Compare board (def 14).
Origin of motherboard Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for motherboard
  • Eventually, all these external services will be built into the television set's motherboard.
  • Here, three graphics cards are installed on one motherboard.
  • So you'd get these little chips, and you have to put them in the motherboard.
  • Not the pain of the frustrated desktop user or the stymied motherboard programmer, but of the commuting motorist.
  • Loading up new software requires removing the motherboard from the machine.
  • It's so easy to have a microscopic element on a motherboard that allows people to get in without authorization.
British Dictionary definitions for motherboard


(in an electronic system) a printed circuit board through which signals between all other boards are routed
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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motherboard in Science
The main circuit board of a computer, usually containing the central processing unit and main system memory as well as circuitry that controls the disk drives, keyboard, monitor, and other peripheral devices.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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motherboard in Technology
(mobo) The main printed circuit board in an electronic device, particularly a computer, which may contain sockets that accept additional boards ("daughter-boards").
In a personal computer, the motherboard contains the bus, the microprocessor, and integrated circuits used for controlling any built-in peripherals such as the keyboard, text and graphics display, serial ports and parallel ports, joystick, and mouse interfaces.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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