Source : Webster's Revised Unabridged Dictionary (1913)

Oscillatory \Os"cil*la*to*ry\, a. [Cf. F. oscillatoire. See
   {Oscillate}.]
   Moving, or characterized by motion, backward and forward like
   a pendulum; swinging; oscillating; vibratory; as, oscillatory
   motion.

Source : WordNet®

oscillatory
     adj : having periodic vibrations [syn: {oscillating}]