cush-cush
/ˈkʊʃkʊʃ/(亦作cush-cush yam)
noun
1- a tropical American yam which produces a number of tubers on each plant（南美洲）三浅裂薯蓣。
1.1
- Dioscorea trifida, family Dioscoreaceae.拉丁名Dioscorea trifida, 薯蓣科。
1.2
- mass noun the edible tuber of this plant, eaten as a vegetable卡许山药, 三裂叶薯。
词源
late 19th cent.: perhaps ultimately of African origin.