cos lettuce meaning in Hindi

Cos lettuce, I know, is our romaine, and I presume that brown onions are Spanish onions.
And while it's easy to assume that the Cos lettuce called for in the Caesar salad is another name for romaine, it's hard to guess with groundnut oil.

noun.

lettuce with long dark-green leaves in a loosely packed elongated head
synonyms：, ,
lettuce with long dark-green spoon-shaped leaves
synonyms：,