From WordNet (r) 3.0 (2006) [wn]:
cole
n 1: a hardy cabbage with coarse curly leaves that do not form a
head [syn: kale, kail, cole, borecole, colewort,
Brassica oleracea acephala]
2: coarse curly-leafed cabbage [syn: kale, kail, cole]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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]