man·gel-wur·zel /-ˌwɝzəl/
  Man·gel-wur·zel n.  Bot. A kind of large field beet (Beta macrorhiza), used as food for cattle, -- by some considered a mere variety of the ordinary beet. See Beet. [Written also mangold-wurzel.]
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  mangel-wurzel
       n 1: beet with a large yellowish root; grown chiefly as cattle
            feed [syn: mangold-wurzel, mangold, Beta vulgaris
            vulgaris]
       2: cultivated as feed for livestock