the crisp, pungent, edible root of the plant, Raphanus sativus, of the mustard family, usually eaten raw.
2.
the plant itself.
Origin: bef. 1000; late ME radish(e), var. (cf. OF radise, var. of radice) of ME radich(e), OE rǣdic < L rādīc- (s. of rādīxroot1); cf. OHG rātih, G Rettich