cos lettuce
noun /ˌkɒs ˈletɪs/, /ˌkɒz ˈletɪs/
/ˌkɑːs ˈletɪs/
(British English) (North American English romaine)
[countable, uncountable]- a type of lettuce with long, narrow leaves that form a tall head
长叶莴苣 词源late 17th cent.: named after the Aegean island of Cos, where it originated.