cos lettuce

Noun cos lettuce has 2 senses

• cos lettuce(n = noun.plant) lactuca sativa longifolia, romaine lettuce - lettuce with long dark-green spoon-shaped leaves;
is a member of genus lactuca, lactuca
is a kind of lettuce

• cos lettuce(n = noun.food) cos, romaine, romaine lettuce - lettuce with long dark-green leaves in a loosely packed elongated head;
is a kind of lettuce