A part of the sacerdotal habit among Jews, being a covering
   for the back and breast, held together on the shoulders by two clasps
   or brooches of onyx stones set in gold, and fastened by a girdle of the
   same stuff as the ephod. The ephod for the priests was of plain linen;
   that for the high priest was richly embroidered in colors. The
   breastplate of the high priest was worn upon the ephod in front.