castor
(also caster), n
1 any of the small swivelling wheels fixed to the bottom of a piece of furniture so that it can be moved easily (家具的)小腳輪. =>illus at App 1 見附錄1之插圖, page xvi.
2 small container with holes in the top for sprinkling sugar, etc 調味瓶(頂端有小孔, 用以撒糖等).