As used in this chapter, the following terms shall have the meanings indicated:
Every device propelled by the feet acting upon pedals and having wheels, any two of which are not less then 20 inches in diameter.
A frame made of material fitted to the sole of a shoe or to which a shoe or boot is attached which in turn is attached to a runner or set wheels for gliding over a surface other than ice.
The right of one vehicle or pedestrian to proceed in a lawful manner in preference to another vehicle or pedestrian approaching under such circumstances of direction, speed and proximity as to give rise to danger of collision unless one grants precedence to the other.
A board of any material to which is attached a set of runners or wheels for gliding over a surface other than ice upon which a person stands in order to propel such board with either foot over a surface while standing on the board.