cavolo nero
Concise Oxford English Dictionary © 2008 Oxford University Press:
cavolo nero /ˌkavələʊ ˈnɛːrəʊ/
▶noun a dark-leaved variety of kale used in Tuscan cookery.
– origin Ital., from cavolo ‘cabbage’ + nero ‘black’.
'cavolo nero' also found in these Oxford entries:

