castor
castor — noun
1. a small turning wheel attached under the legs or base of a table, chair, or simi
a small turning wheel attached under the legs or base of a table, chair, or similar item, so that you can slide the object from one place to another easily.
The new office chairs have five black castors that glide smoothly over the carpet.
collocation: castors + glide smoothly
Aiko fitted lockable castors to her bookshelf so she could move it into the corner.
passive: fitted to [object]
One castor on the hospital bed came loose, so the nurse called for help.
Pia bought a set of four swivel castors for the filing cabinet in her study.
The librarian pushed the cart across the floor — its castors squeaked with every turn.
- caster
Variant spelling, standard in American English; refers to the same object.
- wheel
Much broader term — a wheel can be on a car or bicycle; a castor is specifically a small furniture wheel that usually swivels.
- roller
More general — can refer to paint rollers, conveyor rollers, or cylindrical objects that roll; less precise for furniture parts.
文法句型
a set of castors
castors on [furniture]
用法筆記
Usually used in the plural (castors) because furniture typically has a set of two or more. The spelling caster is common in American English and is equally correct.