|k(y)üprə|mōnēəm, -nyəm noun
( -s )
Etymology: cupr- + ammonium
1. : any of certain complex ammino radicals or cations containing copper and ammonia ; especially : the bivalent tetrammine-copper cation Cu(NH 3 ) 4 compounds of which are formed by the action of ammonia on ordinary cupric compounds
2. : cuprammonium solution
3. : cuprammonium rayon