pearl barley(n = noun.food) - barley ground into small round pellets;
is a kind of barley, barleycorn

barley, barley candy, barley grass, barley water, common barley, foxtail barley, little barley, pearl, pearl ash, pearl bailey, pearl buck, pearl diver, pearl fishery, pearl gray, pearl grey, pearl harbor, pearl hominy, pearl mae bailey, pearl millet, pearl oyster, pearl river, pearl sago, pearl sydenstricker buck, seed pearl, squirreltail barley, wall barley