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expansion board

American  

noun

  1. Computers. a circuit board, or card, that can be added to the inside of a computer to enhance specific functions such as sound or video graphics.

expansion board Scientific  

  1. A printed circuit board that can be installed to enhance a computer's capabilities, as by increasing memory or improving graphics.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.