/ip'reuh troh"pee euhm/ , Pharm.
an anticholinergic bronchodilator, C 20 H 30 BrNO 3 , used in the treatment of chronic bronchitis and in airway obstruction diseases.
[ i ( so ) pr ( opylnor ) atrop ( in ) ium a component of the chemical name; see ISOPROPYL, NOR-, ATROPINE, -IUM ]