\Cast"er\, n.
1. One who casts; as, caster of stones, etc.; a caster of
   cannon; a caster of accounts.

2. A vial, cruet, or other small vessel, used to contain
   condiments at the table; as, a set of casters.

3. A stand to hold a set of cruets.

4. A small wheel on a swivel, on which furniture is supported
   and moved.