The Collaborative International Dictionary of English v.0.48:

Palmetto \Pal*met"to\, n. [Dim. of palm the tree: cf. Sp.
   palmito.] (Bot.)
   A name given to palms of several genera and species growing
   in the West Indies and the Southern United States. In the
   United States, the name is applied especially to the
   Cham[ae]rops Palmetto, or Sabal Palmetto, the cabbage
   tree of Florida and the Carolinas. See Cabbage tree, under
   Cabbage.
   [1913 Webster]

   Royal palmetto, the West Indian Sabal umbraculifera, the
      trunk of which, when hollowed, is used for water pipes,
      etc. The leaves are used for thatching, and for making
      hats, ropes, etc.

   Saw palmetto, Sabal serrulata, a native of Georgia, South
      Carolina, and Florida. The nearly impassable jungle which
      it forms is called palmetto scrub.
      [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]

WordNet (r) 3.0 (2006):

Sabal palmetto
    n 1: low-growing fan-leaved palm of coastal southern United
         States having edible leaf buds [syn: cabbage palmetto,
         cabbage palm, Sabal palmetto]