1798 W. Taylor in Month.Rev. XXVI. 527Their Americo-mania he seems to consider as a criminal heresy. 
1882 World 11 Jan., Americomania has reached a point when a writer is gravely taken to task..for calling Transatlantic meesses ‘eccentric.’ 
ORIGIN: from America  (see American -o- 
Americo-
Prefix
- America
Coordinate terms
Derived terms
 English words prefixed with Americo-