From The Collaborative International Dictionary of English v.0.48 [gcide]:
Borecole \Bore"cole`\, n. [Cf. D. boerenkool (lit.) husbandman's
cabbage.]
A brassicaceous plant of many varieties, cultivated for its
leaves, which are not formed into a compact head like the
cabbage, but are loose, and are generally curled or wrinkled;
kale.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
borecole
n 1: a hardy cabbage with coarse curly leaves that do not form a
head [syn: kale, kail, cole, borecole, colewort,
Brassica oleracea acephala]