[mass noun]a Eurasian grass which is widely grown for grazing and hay. It is naturalized in North America, where many cultivars have been developed 梯牧草,猫尾草
Phleum pratense, family Gramineae 拉丁名Phleum pratense,禾本科
语源
mid 18th cent.: named after Timothy Hanson, the American farmer who introduced it to Carolina from New York (c.1720)