Rhubarb

loo'barb, n. A plant of many species the fleshy and acid stalks of the common species are used in cookery: roots of several other species furnish a cathartic medicine. [OF. rheubarbe, LL. rheubarbarum, Gr. rheo'n bar bar on, barbarian Rha-plant; rheon, pert, to the Bha, or Volga river, in Pontus.] Rhumb, etc. See under Rhomb.