What does terminal velocity mean ? please help

The maximum constant velocity acquired by a body while falling through a viscous medium is called it's terminal velocity. It is usually denoted by .It is directly proportional to the square of the radius of the body (a²) & the difference of the densities of the body and the fluid .It is inversely proportional to the viscosity of the medium .Formula of Terminal Velocity:

The rearrangement of particles in a physical change. hope this

Answermuch larger;