expansion card

noun Computers.

a card in a computer on which additional chips can be mounted to expand the computer's capabilities.
Also called expansion board.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for expansion board

expansion board

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.