Source : Webster's Revised Unabridged Dictionary (1913)

Briquette \Bri*quette"\, n. [Also {briquet}.] [F., dim. of
   brique brick.]
   1. A block of compacted coal dust, or peat, etc., for fuel.

Source : WordNet®

briquette
     n : a block made from charcoal or coal dust and burned as fuel
         [syn: {briquet}]