ryegrassWiktionary 原文英美构词拆解ryerye词干grassgrass词干词源说明From rye + grass. But compare English ray grass.释义名词noun1countableAny of several species of tufted grasses of the genus Lolium.2uncountableA collection of plants of any of the species, as in a lawn or field.同族词派生词 1annual ryegrass