caster

noun

• 1a person who casts something or a machine for casting something.

• 2 Fishing a fly pupa used as bait.

• 3each of a set of small wheels, free to swivel in any direction, fixed to the legs or base of a heavy piece of furniture so that it can be moved easily.
• the angular inclination of a steering pivot or kingpin, especially that of the front wheel of a vehicle.

• 4a small container with holes in the top, especially one used for sprinkling sugar or pepper.