amplitude

(am′plĭ-tood″)

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[L. amplitudo]

1. Amount, extent, size, abundance, or fullness.
2. In physics, the extent of movement, as of a pendulum or sound wave. The maximum displacement of a particle, as that of a string vibrating, as measured from the mean to the extreme.
3. Magnitude of an action potential.
4. In radiography, the extent of tube travel during tomography.

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