Meanings
plural billion-dollar grasses
- countableuncountableAny member of the genus Echinochloa of barnyard grass, widely considered harmful weeds.
Synonyms & antonyms
nouncoarse annual grass cultivated in Japan and southeastern Asia for its edible seeds and for forage; important wildlife food in United States
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Probably so-called because of the adverse impact of Echinochloa weeds on yields rice and other crops.
Full word history & related roots →Cite this entry
billion-dollar grass. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/billion-dollar%20grass
“billion-dollar grass.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/billion-dollar%20grass. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “billion-dollar grass,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/billion-dollar%20grass.
Source: billion-dollar grass on Wiktionary, CC BY-SA 4.0.