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1. (n.) plethysmograph
a device for measuring and recording changes in the volume of the body or of a body part or organ.
Etymology: (1870–75; < Gk plēthysm(ós) increase, multiplication (plēthý(nein) to increase, der. of plêthos large number, crowd +-smos, var. of -mos n. suffix) + -o - + -graph ; first coined in It as pletismografo)
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| Definition of 'plethysmograph' |
Princeton's WordNet |
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1. (noun) 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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| Definition of 'plethysmograph' |
Webster Dictionary |
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1. (noun) plethysmograph
an instrument for determining and registering the variations in the size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb
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Definitions of plethysmograph 
