Source : Webster's Revised Unabridged Dictionary (1913)

Rondle \Ron"dle\, n. [Cf. {Rondel}.]
   1. A rondeau. [Obs.] --Spenser.

   2. A round mass, plate, or disk; especially (Metal.), the
      crust or scale which forms upon the surface of molten
      metal in the crucible.