The Collaborative International Dictionary of English v.0.48:

Salad \Sal"ad\ (s[a^]l"ad), n. [F. salade, OIt. salata, It.
   insalata, fr. salare to salt, fr. L. sal salt. See Salt,
   and cf. Slaw.]
   1. A preparation of vegetables, as lettuce, celery, water
      cress, onions, etc., usually dressed with salt, vinegar,
      oil, and spice, and eaten for giving a relish to other
      food; as, lettuce salad; tomato salad, etc.
      [1913 Webster]

            Leaves eaten raw are termed salad.    --I. Watts.
      [1913 Webster]

   2. A dish composed of chopped meat or fish, esp. chicken or
      lobster, mixed with lettuce or other vegetables, and
      seasoned with oil, vinegar, mustard, and other condiments;
      as, chicken salad; lobster salad.
      [1913 Webster]

   Salad burnet (Bot.), the common burnet (Poterium
      Sanguisorba), sometimes eaten as a salad in Italy.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Burnet \Bur"net\, n. [OE. burnet burnet; also, brownish (the
   plant perh. being named from its color), fr. F. brunet, dim.
   of brun brown; cf. OF. brunete a sort of flower. See
   Brunette.] (Bot.)
   A genus of perennial herbs (Poterium); especially,
   Poterium Sanguisorba, the common, or garden, burnet.
   [1913 Webster]

   Burnet moth (Zool.), in England, a handsome moth
      (Zyg[ae]na filipendula), with crimson spots on the
      wings.

   Burnet saxifrage. (Bot.) See Saxifrage.

   Canadian burnet, a marsh plant (Poterium Canadensis).

   Great burnet, Wild burnet, Poterium oficinalis (or
      Sanguisorba oficinalis).
      [1913 Webster]

WordNet (r) 3.0 (2006):

Poterium sanguisorba
    n 1: European garden herb with purple-tinged flowers and leaves
         that are sometimes used for salads [syn: salad burnet,
         burnet bloodwort, pimpernel, Poterium sanguisorba]