millet grass
/ˈmɪlɪtɡrɑːs/ /ˈmɪlɪtɡras/noun
Any plant of the genus Milium, which comprises annual and perennial grasses of Eurasia and North America; especially wood millet, M. effusum.
Origin
Late 16th century; earliest use found in John Gerard (c1545–1612), herbalist. From millet + grass.