ˌarəˈnathərəm noun
Usage: capitalized
Etymology: New Latin, from Greek arrhen-, arrhēn male + ather-, athēr awn; from the awned staminate lemma; akin to Sanskrit arṣati it flows, ṛṣabha bull, Latin ros dew — more at roric
: a genus of Eurasiatic grasses that have 2-flowered spikelets, the first floret staminate and awned from the back and are naturalized in cooler parts of No. America — see tall oat grass