circuit board

[sur-kit bawrd]

noun

1. 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.

2. Also called card. Computers.,  a piece of fiberglass or other material upon which chips can be mounted to perform specific functions.

circuit board

noun

1. short for printed circuit board

circuit board

1. See printed circuit board

Word History and Origins

Origin of circuit board¹

First recorded in 1945–50

Example Sentences

At another electronics manufacturer, SVI, robots glided up and down the assembly line bringing hundreds of tiny components to assemble circuit boards in machines that cost hundreds of thousands of dollars.

From BBC

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

That includes the light-emitting diodes, the circuit boards and the durable metal housing that protects the lights in news vans and on film sets.

From Los Angeles Times

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

A fragment of circuit board found in the wreckage was identified as part of a Swiss-made bomb timer which had been sold to Libya.

From BBC

Related Words

• motherboard