motherboards

motherboard

[muhth-er-bawrd, -bohrd]
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:
mother1 + board

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Collins
World English Dictionary
motherboard (ˈmʌðəˌbɔːd)
 
n
(in an electronic system) a printed circuit board through which signals between all other boards are routed

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
motherboard   (mŭ'ər-bôrd')  Pronunciation Key 
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
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