- a device for measuring and recording changes in the volume of the body or of a body part or organ.
Origin of plethysmograph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for plethysmograph
- 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
C19: from Greek plēthusmos enlargement + graphein to write
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
- An instrument that measures variations in the size of an organ or body part on the basis of the amount of blood passing through or present in the part.