RHU'BARB, noun A plant of the genus Rheum, of several species; as the rhapontic, or common rhubarb; the palmated, or true Chinese rhubarb; the compact or Tartarian; the undulated or wave-leafed Chinese rhubarb; and the rubes, or currant rhubarb of mount Libanus. The root is medicinal and much used as a moderate cathartic.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI