rutabaga

from WordNet (r) 3.0 (2006)

rutabaga
    n 1: the large yellow root of a rutabaga plant used as food
         [syn: {rutabaga}, {swede}, {swedish turnip}, {yellow
         turnip}]
    2: a cruciferous plant with a thick bulbous edible yellow root
       [syn: {rutabaga}, {turnip cabbage}, {swede}, {Swedish
       turnip}, {rutabaga plant}, {Brassica napus napobrassica}]

from The Collaborative International Dictionary of English v.0.48

Ruta-baga \Ru`ta-ba"ga\, n. (Bot.)
   A kind of turnip commonly with a large and long or ovoid
   yellowish root; a Swedish turnip. See {Turnip}.
   [1913 Webster]