The Collaborative International Dictionary of English v.0.48:

Cole \Cole\ (k[=o]l), n. [OE. col, caul, AS. cawl, cawel, fr. L.
   caulis, the stalk or stem of a plant, esp. a cabbage stalk,
   cabbage, akin to Gr. kaylo`s. Cf. Cauliflower, Kale.]
   (Bot.)
   A plant of the Brassica or Cabbage genus; esp. that form of
   Brassica oleracea called rape and coleseed.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Coleseed \Cole"seed`\, n.
   The common rape or cole.
   [1913 Webster]