1886 E. C. Grenville-Murray Young Widows 33Gold often runs to gold, or to simili-gold, like steel to the magnet. 
1892 Harper's Mag. Sept. 500/2He provides the French middle classes with the finest simili-literature that there is in the market. 
1898 E. P. Evans Evol. Ethics v. 175Rubies, spinels, and simili distinguishable from real diamonds only by experts. 
ORIGIN: from Latin  similis  like, similar -i-