( BrE ) ( NAmE cas·ter ) / ˈkɑːstə(r); NAmE ˈkæs-/ noun
one of the small wheels fixed to the bottom of a piece of furniture so that it can be moved easily
—picture at swivel
••
WORD ORIGIN
late 17th cent. relating to a small container with holes in the top used for sprinkling: originally a variant of caster , in the general sense something that casts .