vibration
vi.bra.tion \vi--'bra--sh*n\ \-shn*l, -sh*n-*l\ \-sh*n-l*s\ n 1a: a
periodic motion of the particles of an elastic body or medium in alte
rnately opposite directions from the position of equilibrium when that
equilibrium has been disturbed (as when a stretched cord produces musical
tones or particles of air transmit sounds to the ear) 1b: the action of
vibrating : the state of being vibrated or in vibratory motion : as 1b1:
OSCILLATION 1b2: a quivering or trembling motion : QUIVER 2: an instance
of vibration 3: vacillation in opinion or action : WAVERING -
vi.bra.tion.al aj