noun Date: 1743 a grass (especially Digitaria sanguinalis ) that has creeping or decumbent stems which root freely at the nodes and that is often a pest in turf or cultivated lands
CRABGRASS
Meaning of CRABGRASS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012