Shaking that occurs in a relaxed limb. It usually stops when a voluntary movement of the affected limb is made.

Tremor is a rythmic movement or shaking of any part of the body. The tremor of Parkinson's disease is called a "resting tremor" because it is present when a limb is at rest and may be reduced or go away when the limb is held up or otherwise used by the patient. Most other types of tremor are reduced or absent when the limb is at rest and relaxed.

tremor of the limb or body while the body is at rest.

Present when involved body segment is at rest; typically disappears or decreases with purposeful movement.