Онлайн-словарь

 
 I.  noun 
 Usage: often attributive Date: before 12th century any of numerous slender-bodied diurnal lepidopteran insects including one superfamily (Papilionoidea) with broad often brightly colored wings and usually another superfamily comprising the skippers, something that resembles or suggests a butterfly, a swimming stroke executed in a prone position by moving both arms in a circular motion while kicking both legs up and down, a feeling of hollowness or queasiness caused especially by emotional or nervous tension or anxious anticipation, a defensive move by a goalie in ice hockey executed by dropping to the knees while spreading the lower legs outward, 
 
 II. transitive  verb (-flied; -flying)
 Date: 1954
 to split almost entirely and spread apart

 butterfly bush 
  noun 
 Date: 1923
  buddleia  

 butterfly chair 
  noun 
 Date: 1953
 a chair for lounging consisting of a cloth sling supported by a frame of metal tubing or bars

 butterfly effect 
  noun 
 Date: 1984
 a property of chaotic systems (as the atmosphere) by which small changes in initial conditions can lead to large-scale and unpredictable variation in the future state of the system

 butterfly fish 
  noun 
 Date: 1740
 any of a family (Chaetodontidae) of small brilliantly colored bony fishes of tropical seas with a narrow deep body and scaled fins, a small brown freshwater bony fish ( Pantodon buchholzi of the family Pantodontidae) of western Africa that has elongate winglike pectoral fins

 butterfly valve 
  noun 
 Date: 1846
 a valve consisting of two semicircular clappers hinged to a cross rib that permits fluid flow in only one direction, a damper or valve in a pipe consisting of a disk turning on a bisecting axis

 butterfly weed 
  noun 
 Date: 1816
 a North American milkweed ( Asclepias tuberosa ) with showy orange flowers borne on erect leafy stems