code golfing a clojure function to determine if two numbers are opposite (1 and -1, for example)

opposite.clj

 (defn opposite?
  "Returns true if x and y are opposite numbers, false otherwise."
  [x y]                                                                                                                                                                                                                                                                                                                                                                                                                               
  (and (zero? (+ x y))                                                                                                                                                                                                                                                                                                                                                                                                                
       (every? (complement zero?) [x y])))                                                                                                                                                                                                                                                                                                                                                                                            
                                             
(= true (opposite? 1 -1))
(= true (opposite? 0.27 -0.27))
(= false (opposite? -1 2))
(= false (opposite? -2 -2))