Motherboard definitions

mŭth'ər-bôrd'
The main interconnecting circuit board in an electronic device, into or on which the various subassemblies, as printed circuit boards, are plugged or wired.
noun
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The main printed circuit board in a complex electronic device, such as a personal computer, usually containing the central processing unit, the main system memory, and other components essential to the device's operation.
noun
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The definition of a motherboard is an insulated board within an electronic device into which circuits or wires are connected and plugged.

An example of a motherboard is the main board in your computer that contains the circuitry for everything required for you to type the words on your keyboard.

noun
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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.
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Also called the "system board," "main board" "base board" or "logic board," it is the primary printed circuit board in a computer or other electronic device. In a modern desktop computer, the motherboard contains the CPU and RAM sockets as well as the chipset, which houses the control circuits for all the peripheral devices (drives, keyboard, mouse, etc.). A motherboard typically also has a PCI-Express slot for a high-end graphics card and PCI slots for additional peripherals. Laptop motherboards do not have expansion slots for more peripherals.Wanna Sound Cool?Every now and then, say "mobo" instead of motherboard, and you will be a "cool geek." See CPU, chipset, PCI Express, PCI and controller.
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(computer hardware) The primary circuit board of a personal computer, containing the circuitry for the central processing unit, keyboard, mouse and monitor, together with slots for other devices.
noun
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Origin of motherboard