The Collaborative International Dictionary
Italian ray grass
Ray grass \Ray" grass`\ (r[=a]" gr[.a]s`). [Etymol. of ray is uncertain.] (Bot.) A perennial European grass ( Lolium perenne); -- called also rye grass, and red darnel. See Darnel, and Grass.
Italian ray grass or Italian rye grass. See Darnel, and Grass.