rocambole
Concise Oxford English Dictionary © 2008 Oxford University Press:
rocambole /ˈrɒk(ə)mbəʊl/
▶noun a plant that is closely related to garlic and is sometimes used as a flavouring. [Allium scorodoprasum.]
– origin C17: from Fr., from Ger. Rockenbolle.
'rocambole' also found in these Oxford entries:

