1. Ratio of the adjacent side to the hypotenuse of a right-angled triangle
   "The cos function is used in many physics equations";
   - cosine
    
2. Lettuce with long dark-green leaves in a loosely packed elongated head
   "Caesar salad is traditionally made with cos lettuce";
   - cos lettuce, romaine, romaine lettuce

1. For the reason that; on account of
   - as, because, since, for, coz [Brit, informal], cuz [non-standard, informal], forasmuch as [archaic]

1. A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
   - cobalt, atomic number 27

Derived forms: coses

Type of: circular function, lettuce, metal, metallic element, trigonometric function

Part of: cobaltite, smaltite

Encyclopedia: Cos, Ariège