Source : Webster's Revised Unabridged Dictionary (1913)

Kale \Kale\, n. [Scot. kale, kail, cale, colewort, Gael. cael;
   akin to Ir. cal, W. cawl, Armor. kaol. See {Cole}.]
   1. (Bot.) A variety of cabbage in which the leaves do not
      form a head, being nearly the original or wild form of the
      species. [Written also {kail}, and {cale}.]

   2. See {Kail}, 2.

   {Sea kale} (Bot.), a European cruciferous herb ({Crambe
      maritima}), often used as a pot herb; sea cabbage.