WordReference Random House Unabridged Dictionary of American English © 2020
Johnson grass′, 
  • Plant Biologya sorghum, Sorghum halepense, that spreads by creeping rhizomes, grown for fodder. Also called  Aleppo grass, Means grass. 
    • named after William Johnson, American agriculturist who first planted it in 1840 1880–85, American.

    'Johnson grass' also found in these entries (note: many are not synonyms or translations):
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