rad·ish 
(rădĭsh)
(rădĭsh)n.
1. A Eurasian plant (Raphanus sativus) in the mustard family, having a fleshy edible root and white to purple flowers clustered in a terminal raceme.
2. The pungent root of this plant, often eaten raw.
[Middle English radiche, from Old English rædic, from Latin rādīx, rādīc-, root; see wrād- in the Appendix of Indo-European roots.]