cush-cush
Concise Oxford English Dictionary © 2008 Oxford University Press:
cush-cush /ˈkʊʃkʊʃ/
▶noun a tropical American yam which produces a number of edible tubers on each plant. [Dioscorea trifida.]
– origin C19: perh. ult. of Afr. origin.
'cush-cush' also found in these Oxford entries:

