circuit board
Americannoun
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Electronics. a sheet made up of layers of conductive and insulating material used for the mounting and interconnection, often by a printed circuit, of components in electronic equipment.
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Also called card. Computers. a piece of fiberglass or other material upon which chips can be mounted to perform specific functions.
noun
Etymology
Origin of circuit board
First recorded in 1945–50
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
You don’t want a low-quality battery that might catch fire, or a compromised or modified circuit board that bypasses normal security guards.
From The Wall Street Journal ● Aug. 23, 2026
Li taught himself computer programming and learned how to design a circuit board.
From Barron's ● Jan. 29, 2026
Now the retired director of photography is fielding orders for the BlueChirper after teaching himself how to make a circuit board that can emit the annoying sound and flash a blue light.
From Los Angeles Times ● May 29, 2025
The single most important piece of evidence from the case was a thumbnail-sized fragment of circuit board, found embedded in the neck band of a shirt from the suitcase that held the bomb.
From BBC ● Jan. 14, 2025
Calypso ran her fingers across the completed circuit board.
From "The House of Hades" by Rick Riordan
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