Colloquial shortening of CHROMOLITHOGRAPH. (In use shortly after 1850). Also in comb.
1868. Daily News, 27 Nov., 5/6. The six chromo-facsimiles of my water-colour paintings are now lying before me.
1874. F. Leslies Illust. Newspr., 10 Oct., 79 (Hoppe). Selling our new maps, pictures, chromos.
1875. Printing Times, 15 Jan. Louis Prang, Mr. Prang [born 1827] was the first to apply the designation of chromos, being an abbreviation of chromolithographs.