oilskin
noun uk/ˈɔɪl.skɪn/ us/ˈɔɪl.skɪn/
[ U ]防水油布，防雨油布
cotton cloth that has a thin layer of oil on it to make it waterproof
a hat made of oilskin 防雨油布做的帽子
[ C usually plural ]（油布）雨衣
a piece of clothing made out of oilskin
The fishermen were all wearing oilskins. 渔民们都穿着油布雨衣。