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1. European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage
   - redstem storksbill, alfilaria, alfileria, filaree, clocks, pin grass, pin clover, Erodium cicutarium
    
2. Slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects

Derived forms: filariae

Type of: heron's bill, nematode, nematode worm, roundworm, storksbill

Part of: family Filariidae, Filariidae

Encyclopedia: Filaria