# cos lettuce

> English word · Noun

## Definitions
1. Synonym of romaine lettuce, a long-leaved variety of lettuce.

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/cos-lettuce