Source : Webster's Revised Unabridged Dictionary (1913)

Thunderer \Thun"der*er\, n.
   One who thunders; -- used especially as a translation of L.
   tonans, an epithet applied by the Romans to several of their
   gods, esp. to Jupiter.

         That dreadful oath which binds the Thunderer. --Pope.

Source : WordNet®

Thunderer
     n 1: an epithet for Jupiter [syn: {Jupiter Tonans}]
     2: a noisemaker that makes a sound like thunder