oscillatory

/ˈɑsələˌtɔri/
adjective
  1. Moving or changing back and forth in a regular rhythm.
    • Engineers studied the oscillatory behavior of the bridge in the wind.
    • The fan's oscillatory movement helped cool the entire room.
    • The oscillatory motion of the pendulum kept perfect time.
  2. Characterized by regular fluctuations or variations between two states.
    • The stock market showed oscillatory patterns throughout the month.
    • Her mood had an oscillatory quality, swinging from joy to sadness quickly.
    • The oscillatory signal in the radio needed adjustment to become clear.