cos lettuce
noun
1.
romaine
.
Origin
1690-1700
British Dictionary definitions for
cos lettuce
cos
1
/
kɒs
/
noun
1.
a variety of lettuce with a long slender head and crisp leaves
Usual US and Canadian name
romaine
Compare
cabbage lettuce
Word Origin
C17: named after
Kos,
the Aegean island of its origin