Noun crabgrass has 1 sense
  1. crabgrass, crab grass, finger grass - grasses with creeping stems that root freely; a pest in lawns
    --1 is a kind of grass
    --1 is a member of Digitaria, genus Digitaria
    --1 has particulars:
     Egyptian grass, crowfoot grass, Dactyloctenium aegypticum; smooth crabgrass, Digitaria ischaemum; large crabgrass, hairy finger grass, Digitaria sanguinalis
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