Definition of plethysmograph
: an instrument for determining and registering variations in the size of an organ, limb, or part resulting from changes in the amount of blood present or passing through it
Origin of plethysmograph
International Scientific Vocabulary, from Greek plēthysmos increase, from plēthynein to increase, from plēthys mass, quantity, from plēthein
First Known Use: 1872
Medical Definition of plethysmograph
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Medical Dictionary: Definition of "plethysmograph"
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