| NOUN | artifact | digital plethysmograph | plethysmograph applied to a digit of the hand or foot to measure skin blood flow |
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| Meaning | plethysmograph applied to a digit of the hand or foot to measure skin blood flow. | |
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| Broader | plethysmograph | A measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains) |
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