oscillation

Os`cil*la"tion, n. Etym: [L. oscillatio a swinging.] 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.

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