The Collaborative International Dictionary of English v.0.48:

Bergamot \Ber"ga*mot\ (b[~e]r"g[.a]*m[o^]t), n. [F. bergamote,
   fr. It. bergamotta; prob. a corruption of Turk. beg arm[=u]di
   a lord's pear.]
   1. (Bot.)
      (a) A tree of the Orange family (Citrus bergamia),
          having a roundish or pear-shaped fruit, from the rind
          of which an essential oil of delicious odor is
          extracted, much prized as a perfume. Also, the fruit.
      (b) A variety of mint (Mentha aquatica, var. glabrata).
          [1913 Webster]

   2. The essence or perfume made from the fruit.
      [1913 Webster]

   3. A variety of pear. --Johnson.
      [1913 Webster]

   4. A variety of snuff perfumed with bergamot.
      [1913 Webster]

            The better hand . . . gives the nose its bergamot.
                                                  --Cowper.
      [1913 Webster]

   5. A coarse tapestry, manufactured from flock of cotton or
      hemp, mixed with ox's or goat's hair; -- said to have been
      invented at Bergamo, Italy. Encyc. Brit.
      [1913 Webster]

   Wild bergamot (Bot.), an American herb of the Mint family
      (Monarda fistulosa).
      [1913 Webster]
      [1913 Webster]

WordNet (r) 3.0 (2006):

Citrus bergamia
    n 1: small tree with pear-shaped fruit whose oil is used in
         perfumery; Italy [syn: bergamot, bergamot orange,
         Citrus bergamia]