ru·ta·ba·ga (rtə-bā′gə, rtə-, r′tə-bāgə, rt′ə-)
1. A plant (Brassica napus var. napobrassica) in the mustard family, having a thick bulbous yellowish root used as a vegetable.
2. The edible root of this plant. In both senses also called swede, Swedish turnip.
[Swedish dialectal rotabagge : rot, root (from Old Norse rōt; see wrād- in the Appendix of Indo-European roots) + bagge, bag (from Old Norse baggi).]
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