Peak to Peak definitions

Peak to Peak

This is one way to express the magnitude of a generated waveform, or amplitude. Specifically, the peak to peak voltage will represent the difference from the two peaks of the waveform—from its maximum peak to its minimum peak
Found on http://www.used-line.com/glossaries/glossary.cfm?g_id=26

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Peak to Peak

The amplitude of the ac wave form from its positive peak to its negative peak.
Found on http://www.youngco.com/young2.asp?ID=4&Type=3

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