cos/kɔs; kɑs/ n[C, U](also ,cos `lettuce) (type of) long-leaved lettuce （一种）长叶莴苣. cos (also cos), / kəz; kəz/ conj (infml 口) (esp in spoken English) because 因为.cos / kɔs; kɑs/ abbr 缩写 = (mathematics 数) cosine. Cf 参看 sin abbr 缩写.
牛津英汉双解词典