moth·er·board (m    r-bôrd , -b rd)n. The main board of a computer, usually containing the circuitry for the central processing unit, keyboard, and monitor and often having slots for accepting additional circuitry. |
motherboard [ˈmʌðəˌbɔːd]
n
(Electronics) (in an electronic system) a printed circuit board through which signals between all other boards are routed
| motherboard (mthr-bôrd) 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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