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Definition of Cos
1. Noun. Ratio of the adjacent side to the hypotenuse of a right-angled triangle.
2. Noun. Lettuce with long dark-green leaves in a loosely packed elongated head.
Definition of Cos
1. Proper noun. An island of the Dodecanese, Greece. ¹
2. Noun. A variety of lettuce with long, crisp leaves. ¹
3. Conjunction. (U.K.) because ¹
¹ Source: wiktionary.com
Definition of Cos
1. a variety of lettuce [n -ES]