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. 2019
Examples from the Web for plethysmograph
Historical Examples of 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
Word Origin for plethysmograph
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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.