rad·ish /ˈrædɪʃ ||ˈrɛ-/
  小蘿蔔
  Rad·ish n.  Bot. The pungent fleshy root of a well-known cruciferous plant (Raphanus sativus); also, the whole plant.
  Radish fly Zool., a small two-winged fly (Anthomyia raphani) whose larvae burrow in radishes. It resembles the onion fly.
  Rat-tailed radish Bot., an herb (Raphanus caudatus) having a long, slender pod, which is sometimes eaten.
  Wild radish Bot., the jointed charlock.
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  radish
       n 1: pungent fleshy edible root
       2: pungent edible root of any of various cultivated radish
          plants
       3: Eurasian plant widely cultivated for its edible pungent root
          usually eaten raw [syn: Raphanus sativus]