plethysmogram

noun

ple·​thys·​mo·​gram ple-ˈthiz-mə-ˌgram 

plə-

: a tracing made by a plethysmograph

Word History

Etymology

probably borrowed from German Plethysmogramm, from plethysmo- (in Plethysmograph plethysmograph) + -gramm -gram

First Known Use

1894, in the meaning defined above

Medical Definition

plethysmogram

noun

ple·​thys·​mo·​gram ple-ˈthiz-mə-ˌgram, plə- 

: a tracing made by a plethysmograph