Xăn’tho-rhī’zā, n.

(zăn’tho-rī’zā), n. [Gr. ξανθός, yellow, and ῥίζα, root.] (Bot.) A genus of North American plants, including but one species (X. apiifolia), having roots of a deep-yellow color; yellow-root. The bark is intensely bitter, and is sometimes used as a tonic. Baird.