What does "cos lettuce" mean?

Synonym of romaine lettuce, a long-leaved variety of lettuce.

What is a synonym for "cos lettuce"?

Common synonyms include: cos, lactuca sativa longifolia, romaine, romaine lettuce.

noun

noun ·Rare ·Advanced level

Noun

1
Synonym of romaine lettuce, a long-leaved variety of lettuce. UK, countable, uncountable
2
Alternative letter-case form of cos lettuce, romaine lettuce. UK, alt-of, uncountable
3
lettuce with long dark-green leaves in a loosely packed elongated head wordnet
4
lettuce with long dark-green spoon-shaped leaves wordnet

Etymology 1

Uncertain. Variously derived from Cos, an alternative spelling of the Greek island of Kos, or from Arabic خس (ḵass, “lettuce”).

Etymology 2

From the supposed origin of cos lettuce with reference to the Greek island of Kos.