A tremor, or shaking, usually begins in a limb, often your hand or fingers. You may notice a back-and-forth rubbing of your thumb and forefinger, known as a pill-rolling tremor. One characteristic of Parkinson's disease is a tremor of your hand when it is relaxed (at rest). Slowed movement (bradykinesia).
The vertical bar is often called a ' pipe '. It is often used in mathematics, logic and statistics. It typically is read as 'given that'. In probability and statistics it often indicates conditional probability, but can also indicate a conditional distribution. You can read it as 'conditional on'.
Vertical describes something that rises straight up from a horizontal line or plane. A telephone pole or a tree can usually be described as vertical in relation to the ground. The walls of your house â unless there's some terrible problem â are vertical. They rise straight up from the foundation, at a ninety degree angle.