Ratio of the adjacent side to the hypotenuse of a right-angled triangle.

synonym: cosine.

Dutch: cosinus
Polish: cos, cosinus, kosinus

Lettuce with long dark-green leaves in a loosely packed elongated head.

synonyms: cos lettuce, romaine, romaine lettuce.

Dutch: snijsla
Polish: endywia letnia, sałata długolistna, sałata rzymska, sałata z wyspy Kos