The Collaborative International Dictionary of English v.0.48:

Colza \Col"za\, n. [F., fr. D. koolzaad, prop., cabbage seed;
   kool (akin to E. cole) + zaad, akin to E. seed.] (Bot.)
   A variety of cabbage (Brassica oleracea), cultivated for
   its seeds, which yield an oil valued for illuminating and
   lubricating purposes; summer rape.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rape \Rape\, n. [L. rapa, rapum, akin to Gr. "ra`pys, "ra`fys,
   G. r["u]be.] (Bot.)
   A name given to a variety or to varieties of a plant of the
   turnip kind, grown for seeds and herbage. The seeds are used
   for the production of rape oil, and to a limited extent for
   the food of cage birds.
   [1913 Webster]

   Note: These plants, with the edible turnip, have been
         variously named, but are all now believed to be derived
         from the Brassica campestris of Europe, which by some
         is not considered distinct from the wild stock
         (Brassica oleracea) of the cabbage. See Cole.
         [1913 Webster]

   Broom rape. (Bot.) See Broom rape, in the Vocabulary.

   Rape cake, the refuse remaining after the oil has been
      expressed from the rape seed.

   Rape root. Same as Rape.

   Summer rape. (Bot.) See Colza.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Brassica \Bras"si*ca\, prop. n. [L., cabbage.] (Bot.)
   A genus of plants embracing several species and varieties
   differing much in appearance and qualities: such as the
   common cabbage (Brassica oleracea), broccoli, cauliflowers,
   etc.; the wild turnip (Brassica campestris); the common
   turnip (Brassica rapa); the rape or coleseed (Brassica
   napus), etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Broccoli \Broc"co*li\, n. [It. broccoli, pl. of broccolo sprout,
   cabbage sprout, dim. of brocco splinter. See Broach, n.]
   (Bot.)
   A plant of the Cabbage species (Brassica oleracea) of many
   varieties, resembling the cauliflower. The "curd," or
   flowering head, is the part used for food.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cabbage \Cab"bage\ (k[a^]b"b[asl]j), n. [OE. cabage, fr. F.
   cabus headed (of cabbages), chou cabus headed cabbage,
   cabbage head; cf. It. capuccio a little head, cappuccio cowl,
   hood, cabbage, fr. capo head, L. caput, or fr. It. cappa
   cape. See Chief, Cape.] (Bot.)
   1. An esculent vegetable of many varieties, derived from the
      wild Brassica oleracea of Europe. The common cabbage has
      a compact head of leaves. The cauliflower, Brussels
      sprouts, etc., are sometimes classed as cabbages.
      [1913 Webster]

   2. The terminal bud of certain palm trees, used, like,
      cabbage, for food. See Cabbage tree, below.
      [1913 Webster]

   3. The cabbage palmetto. See below.
      [1913 Webster]

   Cabbage aphis (Zool.), a green plant-louse (Aphis
      brassic[ae]) which lives upon the leaves of the cabbage.


   Cabbage beetle (Zool.), a small, striped flea-beetle
      (Phyllotreta vittata) which lives, in the larval state,
      on the roots, and when adult, on the leaves, of cabbage
      and other cruciferous plants.

   Cabbage fly (Zool.), a small two-winged fly (Anthomyia
      brassic[ae]), which feeds, in the larval or maggot state,
      on the roots of the cabbage, often doing much damage to
      the crop.

   Cabbage head, the compact head formed by the leaves of a
      cabbage; -- contemptuously or humorously, and
      colloquially, a very stupid and silly person; a numskull.


   Cabbage palmetto, a species of palm tree (Sabal Palmetto)
      found along the coast from North Carolina to Florida.

   Cabbage rose (Bot.), a species of rose (Rosa centifolia)
      having large and heavy blossoms.

   Cabbage tree, Cabbage palm, a name given to palms having
      a terminal bud called a cabbage, as the Sabal Palmetto
      of the United States, and the Euterpe oleracea and
      Oreodoxa oleracea of the West Indies.

   Sea cabbage.(Bot.)
      (a) Sea kale
      (b) . The original Plant (Brassica oleracea), from which
          the cabbage, cauliflower, broccoli, etc., have been
          derived by cultivation.

   Thousand-headed cabbage. See Brussels sprouts.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cauliflower \Cau"li*flow`er\, n. [F. choufleur, modified by E.
   Cole. L. caulis, and by E. flower; F. chou cabbage is fr. L.
   caulis stalk, cabbage, and fleur flower is fr. L. flos
   flower. See Cole, and Flower.]
   1. (Bot.) An annual variety of Brassica oleracea, or
      cabbage, of which the cluster of young flower stalks and
      buds is eaten as a vegetable.
      [1913 Webster]

   2. The edible head or "curd" of a cauliflower plant.
      [1913 Webster]

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:

collard \collard\ n.
   1. a variety of kale (Brassica oleracea) having smooth
      leaves; a type of colewort. It is grown in the southern U.
      S.
      [WordNet 1.5 +PJC]

The Collaborative International Dictionary of English v.0.48:

collards \col"lards\ (k[o^]l"l[~e]rdz), n. pl. [Corrupted fr.
   colewort.]
   1. Young cabbage, used as "greens"; esp. the leaves of a kind
      of kale (Brassica oleracea acephala) cultivated for that
      purpose, the collard or colewort. [Colloq. Southern U. S.]

   Syn: collard greens.
        [1913 Webster +PJC]

   2. A kind of kale (Brassica oleracea acephala) cultivated
      in the southern United States as a vegetable.
      [PJC]

WordNet (r) 3.0 (2006):

Brassica oleracea
    n 1: any of various cultivars of the genus Brassica oleracea
         grown for their edible leaves or flowers [syn: cabbage,
         cultivated cabbage, Brassica oleracea]
    2: wild original of cultivated cabbages; common in western
       coastal Europe [syn: wild cabbage, Brassica oleracea]