Jigger and Mechanical device

Jigger noun - An interesting and often novel device with a practical use.

Mechanical device and jigger are semantically related. In some cases you can use "Mechanical device" instead a noun "Jigger".

Mechanical device noun - Mechanism consisting of a device that works on mechanical principles.

Jigger and mechanical device are semantically related. Sometimes you can use "Jigger" instead a noun phrase "Mechanical device".