柯林斯词典castor /ˈkɑːstə/ →see caster 1. N the brownish aromatic secretion of the anal glands of a beaver, used in perfumery and medicine 海狸香 返回 castor剑桥词典a small wheel , usually one of a set, that is attached to the bottom of a piece of furniture so that it can be moved easily （家具底部的）小腳輪，萬曏輪 返回 castor