Oscillation
Pronunciation : Os`cil*la"tion
Part of Speech : n.
Etymology : [L. oscillatio a swinging.]
Definition : 1. The act of oscillating; a swinging or moving backward and forward, like a pendulum; vibration.
2. Fluctuation; variation; change back and forth. His mind oscillated, undoubtedly; but the extreme points of the oscillation were not very remote. Macaulay. Axis of oscillation, Center of oscillation. See under Axis, and Center.
Source : Webster's Unabridged Dictionary, 1913