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

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

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

Word History and Origins

Origin of plethysmograph¹

C19: from Greek plēthusmos enlargement + graphein to write

Example Sentences

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

From Project Gutenberg

These instruments are the plethysmograph and the hydrosphygmograph.

From Project Gutenberg