Webster’s Revised Unabridged Dictionary · 1913
Oscillatory
Os′cil·la·to·ry (ŏs′sĭl·lȧ·tō·ry̆), a. [Cf. F. oscillatoire. See Oscillate.] Moving, or characterized by motion, backward and forward like a pendulum; swinging; oscillating; vibratory; as, oscillatory motion.