crabgrass
noun
crab·grass ˈkrab-ˌgras 
: 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
Example Sentences
Recent Examples on the Web An abundance of weeds like crabgrass or thatch, fungal growth like mushrooms, standing water or runoff after irrigation, yellowing and eventually dying patches of grass are all signs of overwatering. 
From Usa Today Network And Wire Reports, USA TODAY, 6 June 2022 This invasive weed germinates two to three weeks earlier than another common grassy summer lawn scourge, crabgrass. Miri Talabac, baltimoresun.com, 2 Mar. 2022 As for crabgrass, the best products for use in urban landscapes are Halts, Balan or Dimension. Neil Sperry, San Antonio Express-News, 18 Feb. 2022 Remove the crabgrass, then add new sod or plugs to grow during the cooler months. Tom Maccubbin, orlandosentinel.com, 27 Nov. 2021 Nowadays, several of the world’s key crop plants are C4, including corn, millet, and sorghum, and so are several of the world’s key weeds, like crabgrass and tumbleweed. Elizabeth Kolbert, The New Yorker, 6 Dec. 2021 Preemergence herbicides often used to control crabgrass can keep the runners from rooting down. Tom Maccubbin, orlandosentinel.com, 16 Oct. 2021 Researchers at Michigan State University have found that mulching leaves for just three years produces a nearly 100 percent decrease in dandelion and crabgrass growth. cleveland, 15 Oct. 2021 Keep in mind that crabgrass germinates whensoiltemperatures hit about 55°F for 24-48 hours. Todd Nelson, Star Tribune, 17 Apr. 2021 See More
From Usa Today Network And Wire Reports, USA TODAY, 6 June 2022 This invasive weed germinates two to three weeks earlier than another common grassy summer lawn scourge, crabgrass. Miri Talabac, baltimoresun.com, 2 Mar. 2022 As for crabgrass, the best products for use in urban landscapes are Halts, Balan or Dimension. Neil Sperry, San Antonio Express-News, 18 Feb. 2022 Remove the crabgrass, then add new sod or plugs to grow during the cooler months. Tom Maccubbin, orlandosentinel.com, 27 Nov. 2021 Nowadays, several of the world’s key crop plants are C4, including corn, millet, and sorghum, and so are several of the world’s key weeds, like crabgrass and tumbleweed. Elizabeth Kolbert, The New Yorker, 6 Dec. 2021 Preemergence herbicides often used to control crabgrass can keep the runners from rooting down. Tom Maccubbin, orlandosentinel.com, 16 Oct. 2021 Researchers at Michigan State University have found that mulching leaves for just three years produces a nearly 100 percent decrease in dandelion and crabgrass growth. cleveland, 15 Oct. 2021 Keep in mind that crabgrass germinates whensoiltemperatures hit about 55°F for 24-48 hours. Todd Nelson, Star Tribune, 17 Apr. 2021 See More Word History
First Known Use
1743, in the meaning defined above
Kids Definition
crabgrass
noun
crab·grass ˈkrab-ˌgras
: a weedy grass with coarse stems that root at the joints