Cos lettuce means romaine; supplied descriptions characterize it as a leafy green with a tall, elongated head and sturdy, ribbed leaves.
Cos lettuce means romaine lettuce. Supplied descriptions call it a crisp leafy green and characterize it by a tall, elongated head of sturdy, ribbed leaves. In the September 19 Connections puzzle, the complete phrase is used for separate opening-word wordplay: COS LETTUCE starts with COS, an abbreviated math function.
The exact entry can be found in the September 19, 2026 Connections puzzle, where its food meaning and its puzzle construction should be kept distinct.
Definition and supported description
Merriam-Webster’s supplied result gives the concise definition: cos lettuce is romaine. Another supplied result says cos lettuce is also commonly known as romaine lettuce and describes it as a crisp, refreshing leafy green vegetable. A further result characterizes it as a type of lettuce with a tall, elongated head of sturdy, ribbed leaves.
Those descriptions support using cos lettuce as a food name. They do not establish a different plant for every occurrence of romaine; the direct definition identifies the terms. They also do not explain the entire Connections category. The puzzle depends on the beginning COS rather than grouping four kinds of lettuce.
No additional origin claim is needed here. The supplied evidence defines and describes the expression but does not provide a reliable etymology for the name, so the useful distinction is between ordinary food meaning and puzzle-level wordplay.
Natural examples
An illustrative food sentence is, “The recipe calls for chopped cos lettuce.” The phrase names the leafy ingredient. Another is, “She placed the cos lettuce beside the other vegetables before preparing lunch.” Neither sentence relies on mathematical wordplay.
Romaine can clarify the term in context: “The note labels the ingredient cos lettuce, or romaine lettuce.” That wording reflects the supplied definitions without claiming that one name must be preferred in every place or by every speaker.
For a puzzle-focused example, consider: “Ignore the shared subjects of the complete phrases and inspect COS, LOG, SIN and TAN at their beginnings.” This is an instructional sentence based on the verified group. It demonstrates a parsing method rather than offering a new definition of cos lettuce. All examples here are illustrative, not quotations from the search results.
A common mistake: grouping by the whole phrase’s subject
Because COS LETTUCE clearly names a food, a solver may look for three other foods. That approach does not match this board. The official group is STARTING WITH ABBREVIATED MATH FUNCTIONS, so only the opening segment needs to satisfy the relationship while the complete phrase remains unchanged.
Another possible surface pairing is COS LETTUCE with LOG CABIN as concrete things, but that description is too broad to identify the official rule. Their relevant connection is structural: COS LETTUCE begins with COS, and LOG CABIN begins with LOG. SIN CITY and TAN LINE complete the same opening pattern. Do not shorten the board answers when submitting them; the official words are the complete phrases.
Cos lettuce in Connections
COS LETTUCE is grouped with LOG CABIN, SIN CITY and TAN LINE. The official title is STARTING WITH ABBREVIATED MATH FUNCTIONS. The relationship concerns COS, LOG, SIN and TAN at the starts of the phrases; it does not assert that lettuce, cabins, cities and lines share a separate technical identity.
This group rewards segmented reading. Preserve each exact entry, mark a plausible opening, and compare openings across candidates. COS is especially useful because supplied trigonometry evidence explicitly lists cos as the abbreviation for cosine. The September 19, 2026 solved Connections board shows how the phrase group coexists with three meaning-based categories.
How to recognize the group logic
Begin by asking whether a multiword tile might conceal a shared element at its start. Then require the same position and relationship across four entries. COS LETTUCE, LOG CABIN, SIN CITY and TAN LINE all satisfy the official starting-position rule. A proposal based only on loose subject similarities would not explain the matched openings.
It is also important not to strengthen the rule. The category says the entries start with abbreviated math functions; it does not say the complete phrases are mathematical expressions. Keeping that wording literal protects every official word. Compare this set with the remaining groups in the September 19, 2026 Connections group explanation.