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Jumper Wire

A wire used to bypass electrical circuits or components for testing purposes.

Jumpers

A term used for jumper cable or jumper wire.

Junction

1. A contact point between two or more conductors in a circuit, also called a node. 2. The region separating two layers in a semiconductor material, e.g. a p-n junction.

Junction Block

A device on which two or more junctions may be found.

Junction Transistor

A PNP or NPN transistor formed from three alternate regions of p or n type material. Also called a bi-polar transistor.

Junior Fueler

An old drag-racing term for a lower-class fuel dragster.

Junior Stocker

An old drag-racing term for a lower-class fuel stocker.

Junk

Anything that is so badly worn or deteriorated that it is of no further use.

Junker

A vehicle that is ready for the junk box.

Junky

Anyone in the vehicle salvage business.

Junkyard

A vehicle salvage business that sells used parts.