the root of a tall plant, Veronicastrum virginicum, of the figwort family, having spikelike clusters of small, white, tubular flowers, used in medicine as a cathartic and emetic.
2.
the plant.
Origin: 1710–20, Americanism; named after Dr. Culver, 17th–18th-century American physician
A perennial herb (Veronicastrum virginicum) native to eastern North America, having whorled leaves and small white or pinkish flowers in slender spikes.
The rootstock of this plant, formerly used in medicine as a cathartic and an emetic.
Main Entry: Culver's root Function: noun 1: a tall perennial herb (Veronicastrum virginicum) common in eastern No. America 2: therhizome and roots of Culver's root used as a cathartic called also leptandra