Plethysmograph Definition
plĕ-thĭzmə-grăf, plə-
noun
Any of several instruments for measuring and recording various bodily functions, as the velocity or volume of blood flow, heart rate or breathing rate, changes in the size of organs or limbs, etc.
Webster's New World
Other Word Forms of Plethysmograph
Noun
Singular:
plethysmograph
Plural:
plethysmographsOrigin of Plethysmograph
-
Greek plēthusmos increase (from plēthūnein to increase) (from plēthūs quantity) (from plēthein to be full pelə-1 in Indo-European roots) –graph
From American Heritage Dictionary of the English Language, 5th Edition
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