cos

Noun
  1. Ratio of the adjacent side to the hypotenuse of a right-angled triangle (synset 113809935)
    is a type of: circular function, trigonometric function - function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle
    same as: cosine
  2. Lettuce with long dark-green leaves in a loosely packed elongated head (synset 107740237)
    is a type of: lettuce - leaves of any of various plants of Lactuca sativa
    same as: cos lettuce, romaine, romaine lettuce

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