caster

Someone or something that casts.

a caster of spells

a caster of stones

A wheeled assembly attached to a larger object at its base to facilitate rolling. A caster usually consists of a wheel (which may be plastic, a hard elastomer, or metal), an axle, a mounting provision (usually a stem, flange, or plate), and

Many office chairs roll on a set of casters.

I have my own phone, an electric typewriter and a lovely chair with casters. The floor is carpeted, the lighting is very adequate.

A shaker with a perforated top for sprinkling condiments such as sugar, salt, pepper, etc.

a set of casters

Your waiter having settled that point, returns to array your tablecloth, with a table napkin folded cocked-hat-wise (slowly, for something out of window engages his eye), a white wine-glass, a green wine-glass, a blue finger-glass, a tumbler, and a powerful field battery of fourteen casters with nothing in them; […]

A stand to hold a set of shakers or cruets.

The angle of the axis around which a car's front wheels rotate when the steering wheel is turned, with a vertical axis being defined as zero caster.

In addition, caster helps to reduce steering effort and to return the steering wheel to the center position after a turn.

To act as a caster

A surname.