Oscillation

n.	1.
	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 See under Axis, and Center.

Noun	1.	oscillation - the process of oscillating between states
	2.	oscillation - (physics) a regular periodic variation in value about a mean Synonyms: vibration
	3.	oscillation - a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons" Synonyms: cycle

alternation, beat, cyclicalness, equivocation, fluctuation, intermittence, intermittency, meter, pendulation, pendulum motion, periodicalness, periodicity, piston motion, pulsation, reappearance, recurrence, regular wave motion, reoccurrence, return, rhythm, seasonality, seesawing, shifting, shilly-shally, shilly-shallying, shuffling, teeter-tottering, teetering, tottering, undulation, vacillation, variation, vicissitude, wavering, wobbling