ˈkəlvə(r)z- noun
or culver's physic also culvers
Usage: usually capitalized C
Etymology: after a Dr. Culver fl before 1716 American physician who used it for medicinal purposes
1. : a tall perennial herb ( Veronicastrum virginicum ) common in eastern No. America
2. : the rhizome and roots of Culver's root used as a cathartic