circuit board

This term refers to the physical foundation of most modern electronic devices. It is a technical term used across engineering, computing, and consumer electronics to describe the rigid substrate that houses integrated circuits and capacitors. While often used interchangeably with "PCB" (Printed Circuit Board) in professional contexts, "circuit board" is the more common term for general audiences.

In a practical sense, the term evokes the image of a green or blue plate with intricate copper pathways. It is almost always used in a literal, physical sense; unlike "circuit," which can be abstract or electrical, a "circuit board" is always a tangible hardware component.