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plethysmograph

[ pluh-thiz-muh-graf, -grahf ]

noun

  1. a device for measuring and recording changes in the volume of the body or of a body part or organ.


plethysmograph

/ -ˌɡræf; pləˈθɪzməˌɡrɑːf; -ˈθɪs- /

noun

  1. a device for measuring the fluctuations in volume of a bodily organ or part, such as those caused by variations in the amount of blood it contains
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Other Words From

  • ple·thys·mo·graph·ic [pl, uh, -thiz-m, uh, -, graf, -ik], adjective
  • pleth·ys·mog·ra·phy [pleth-iz-, mog, -r, uh, -fee], noun
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Word History and Origins

Origin of plethysmograph1

First recorded in 1870–75; from Greek plēthysm(ós) “increase, multiplication” ( plēthý(nein) “to increase,” derivative of plêthos “large number, crowd” + -smos, variant of -mos noun suffix) + -o- + -graph; first coined in Italian as pletismografo
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Word History and Origins

Origin of plethysmograph1

C19: from Greek plēthusmos enlargement + graphein to write
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Example Sentences

I think the experimental psychologists called the thing a "plethysmograph."

These instruments are the plethysmograph and the hydrosphygmograph.

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