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Pronunciation varies by accent · noun
A plethysmograph that uses illumination of the skin in order to measures changes in light absorption.
Use photoplethysmograph when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Photoplethysmograph means A plethysmograph that uses illumination of the skin in order to measures changes in light absorption.
Common synonyms include PPG.
The opposite depends on the specific sense.
Use photoplethysmograph where its definition matches the intended context.
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