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Definition of pigeonweed in English:

pigeonweed

noun

US

  • 1Spikenard, Aralia racemosa.

  • 2Either of two weeds, corn gromwell, Lithospermum arvense, and Mexican clover, Richardia scabra (now rare).

Origin

Late 18th century; earliest use found in Manasseh Cutler (1742–1823).