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cos lettuce

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