The earliest occurrence of the term red-shift in print (in this hyphenated form) appears to be by American astronomer Walter S. Adams in 1908, in which he mentions "Two methods of investigating that nature of the nebular red-shift".
A vöröseltolódás kifejezés először Walter S. Adams amerikai csillagász cikkében jelent meg nyomtatásban 1908-ban ("Two methods of investigating that nature of the nebular red-shift".)