expansion card

Also called expansion board.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

expansion board in Science

expansion board

  1. A printed circuit board that can be installed to enhance a computer's capabilities, as by increasing memory or improving graphics.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.