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Friday, December 19th, 2025
the Third Week of Advent
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Bible Dictionaries
Plethysmograph

Webster's Dictionary

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Plethysmography
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(n.) An instrument for determining and registering the variations in the size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb.

Bibliography Information
Webster, Noah. Entry for 'Plethysmograph'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/plethysmograph.html. 1828.
 
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